Ratings Breakdown
User Reviews Overview
Feature Ratings
Ease-of-use
5.0 / 5
Value for Money
5.0 / 5
Customer Support
5.0 / 5
Functionality
5.0 / 5
Pros
"Ease of use - we use manual cleaning for now and it's easy to upload files and get results. We love the way the results are stored and the ranking that mailfloss gives the email. "
"Quick, effective and kind response from their team with any support questions which meant we were up and running within minutes. "
"Integration with our mail provider. Automatic removal of bad e-mails. Fast Support."
Cons
"UI can be a bit friendlier, but still is very functional and clear"
"The speed - it would be epic if you could make it faster! Drag and drop uploading files would be ideal. The rankings of the emails could be simpler. "
"Have been small bumps but the platform has been altered along the way to accommodate."
mailfloss Reviews
Filter by:
January 2021

Rodrigo from Gamifica
Company Size: 1 employee
Industry: Computer Software
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
January 2021
Very effective and very easy to integrate with Hubspot
I was looking for an easy to integrate mail cleaning solution and i tried mailfloss. The easy to integrate (took me about 15 minutes to complete all required tasks) and the simple steps the software provides makes it very powerful for an end user like me.
Pros
What i like the most is: 1) the ease to integrate with Hubspot. 2) the great support from the company.
Cons
i didn't found any missing piece on it, truly.

Response from mailfloss
Replied February 2021
Rodrigo, you are a star. Thanks for your kind review. I am happy to read you found our Hubspot integration easy and appreciate how powerful our platform is.
June 2019
Eugenia from TaxProMarketer
Company Size: 11-50 employees
Industry: Marketing and Advertising
Time Used: Less than 2 years
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
4.0
June 2019
Robots make your life so much easier.
This used to a very tedious and time consuming process that I did manually. With virtually no troubleshooting and very easy configuration, I have literally saved myself hours of work every single week, and it even does a better job than I did before on my own. When I have questions or issues come up, it is very easy to reach out and get quick help. Most of all, I appreciate not having to think about email deliverability and just focus on the emails I'm sending.
Pros
I really appreciated how easy it was to deploy and how effective it really is at flossing our database. It's also very accurate now and it's constantly improving based on feedback!
Cons
Occasionally there's glitches that need to get fixed, and its accuracy is really great but not perfect (though I think that's unattainable for email deliverability anyway).
Reasons for Choosing mailfloss
It has automatic integration with Infusionsoft, including different levels and options (e.g. you can choose whether invalid emails are only tagged, or tagged and opted out automatically). We also got a great deal on the monthly payments because we signed up right when the company was a start up.
Reasons for Switching to mailfloss
The user interface and portal were hard to use and not intuitive. It took time (like 12 hours) to get your cleaned list back after uploading it, so I couldn't just sit down and process a list whenever I needed to. We have over 150,000 emails in our database and list hygiene was quickly becoming my entire job, just to manage it. Impressionwise was making it even harder than it already was.

Response from mailfloss
Replied June 2019
Thank you so much for the amazing review, Eugenia. I'm so glad we've been able to help you not only save hours every week but also help with your email deliverability. You're a treat to work with and an ideal customer. Saving your time, improving your email ROI, and working with great customers - that's the good life :) We've got some exciting stuff on the way that I think you'll like, so stay tuned! Martin
December 2020
Daniel from Design
Company Size: 11-50 employees
Industry: Entertainment
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
3.0
Value for money
4.0
Customer support
5.0
Functionality
5.0
December 2020
Easy to use and great customer service!
Very positive experience! Mailfloss provided easy instructions to integrate with my email service provider to clean my contacts, and cleaning went off without a hitch. When I had questions, [SENSITIVE CONTENT HIDDEN] was quick to respond. He was very helpful through the whole process. Excellent customer service!
Pros
Mailfloss was easy to set up and integrate with my email service provider. Just a few clicks and then I could let it run in the background and forget about it. I especially like how Mailfloss breaks down what it catches by what contacts have full inboxes, are duplicates, are fake, misspelled, etc.
Cons
The after-cleaning reports can be confusing. It takes some digging to figure out exactly how many contacts passed a cleaning and how many were blacklisted. This could probably be remedied with a simpler UI. Allowing free trial users to clean more than 500 contacts (like 1k) would be great too.
Reasons for Choosing mailfloss
I needed a 1-time cleaning rather than a monthly subscription, and Mailfloss had the best price. The free trial was useful to gauge how thorough Mailfloss is in cleaning.

Response from mailfloss
Replied December 2020
Hi Daniel, thanks for your review. Regarding the reports, it's quite easy, you just have to click on the session for the full breakdown in the dashboard. I'll reach out to ensure you know what to look for. Otherwise, I'm glad you were up and running in a few clicks!
February 2021
Nrupesh from Facilit8 Namibia
Company Size: 2-10 employees
Industry: Online Media
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
February 2021
The best solution to your email verification needs!
Pros
Loved that it was easy to setup and upload the emails and it quickly verified them.
Cons
Maybe they could have given more description in the different categories.

Response from mailfloss
Replied February 2021
Appreciate the review, Nrupesh. Thank you.
January 2021
Paul from Bentkey Ventures
Company Size: 51-200 employees
Industry: Media Production
Time Used: Less than 12 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
January 2021
Mailfloss FTW!
I'm using Mailfloss in a high-growth email program at scale and would highly recommend it as an automated solution for keeping your email database clean.
Pros
Lower cost than other alternatives I considered with more customizable features. Mailfloss has found the one thing they can do well, and they do it very well. My integration is with Hubspot and I appreciated the custom properties for list segment and suppression control, the automated list cleaning, and the consistent release of new, valuable features like typo fix.
Cons
Mailfloss was a newer software tool on the market, so it was a little untested, but I was excited to give it a try and it has delivered on expectations.
Reasons for Choosing mailfloss
More customization and control with the Hubspot integration than alternatives (I had trials with 3 other alternatives), lower cost, and active development of new, valuable features.

Response from mailfloss
Replied February 2021
Thanks so much for your review, Paul! I loved reading everything you wrote and am happy to know that we're able to deliver the goods for your high-growth email program.
August 2020
Christopher from E-Learning
Company Size: 2-10 employees
Industry: E-Learning
Time Used: Less than 2 years
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
August 2020
Easy and effective
I've been very happy with Mailfloss. Its functionality, ease-of-use and pricing are all terrific.
Pros
Mailfloss has great Infusionsoft integration, with flexible options including unsubscribing and/or tagging bad contacts, and daily cleaning of new contacts. No 3rd party service like Zapier required.
Cons
It would be great if there was some alerting mechanism if the number of cleaned contacts changed substantially week-to-week.

Response from mailfloss
Replied August 2020
Hey Christopher, I'm so happy to read this, what a way to start the day :) Thank you, I'm glad you like our Infusionsoft integration. We work really hard on them to ensure they are top of the class. We've got something special for our Infusionsoft integration soon so stay tuned. And cool idea about the alerting mechanism, I've added it to our feedback and ideas boards.
September 2019
Nick from eShowcase Inc.
Company Size: 2-10 employees
Industry: E-Learning
Time Used: Less than 12 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
4.0
September 2019
Auto-mazing software to keep your email marketing data sparkling clean
We enjoy having amazing clean email data every day. This means our email sending CRM has a fantastic email marketing reputation. No blacklists, all time low email bounce rate. Super High email deliverability, opens and clicks... and Earnings Per Click. We have tried other email verification services. But nothing has come close to MailFloss.
Pros
MailFloss is producing accurate results and is super easy to both set up and maintain. In fact unless we have to manually import a new list of prospects into our CRM from a third party everything is fully automated and emails me a confirmation message every day. Its stress free. :-)
Cons
Like all new software, you need to give it the time to learn how to use it. It took perhaps 1-2 hours. The pain was well worth the reward later.
Reasons for Choosing mailfloss
it was a false economy to go with anyone else. When you have found the right product, at the right price, that has the right customer service... what else could you possibly be still looking for? MailFloss ticked all the right boxes then... and it still does almost 12 months on. We've VERY happy.
Reasons for Switching to mailfloss
the ease of the AutoFloss Automation with our CRM... and the amazing customer support.

Response from mailfloss
Replied September 2019
Awesome, Nick! I really appreciate your support and I'm glad everything is stress-free for you. That's exactly what we're going for. Martin
January 2021
James from Monkedia LLC
Company Size: 51-200 employees
Industry: Marketing and Advertising
Time Used: Less than 2 years
Review Source: Capterra
Ease-of-use
4.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
January 2021
Customer service is King.
Excellent. Super responsive, helpful, professional company. Whatever you need there the to help. Not 48 hours later. You're not getting an automated response and a generic answer 3 days later. You're getting an extremely helpfull person right away ready to help you even if it's just to help you understanding something.
Pros
If you ever have an issue sometimes they on it before you can even ask about it. There is no lack of help here.
Cons
Have been small bumps but the platform has been altered along the way to accommodate.
Reasons for Choosing mailfloss
Function and customer service.

Response from mailfloss
Replied February 2021
James, appreciate the review, thank you. I'm glad you appreciate our customer support.
November 2020
Guy from Wisdo
Company Size: 11-50 employees
Industry: Health, Wellness and Fitness
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
4.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
November 2020
Fast Implementation and Reliable Product
Decreased our bounce rate to almost nothing. We can have this running in the background and not worry about maintenance or daily adjustments.
Pros
Quick, effective and kind response from their team with any support questions which meant we were up and running within minutes.
Cons
UI can be a bit friendlier, but still is very functional and clear

Response from mailfloss
Replied November 2020
Thanks for the review, Guy. Super happy to read about your bounce rate, and love that you can just let mailfloss run in the background as it works for you in real-time. Love it. Martin
June 2019
Amitesh from AutoRABIT
Company Size: 51-200 employees
Industry: Information Technology and Services
Time Used: Less than 12 months
Review Source: Capterra
Ease-of-use
5.0
Functionality
5.0
June 2019
Good mail validation tool
Pros
Platform is very user friendly and has good accuracy
Cons
I have not come across any cons as such till now

Response from mailfloss
Replied June 2019
Thanks so much for the feedback, Amitesh. I'm happy to hear you find mailfloss user friendly and are happy with the accuracy. We're always pushing to improve our accuracy even further as well as making the platform the easiest and most convenient email verification service to use. It's customers like you that keep us hungry and motivated to making the product better and better, so thank you.
November 2020
Jack from BHCOE
Company Size: 11-50 employees
Industry: Health, Wellness and Fitness
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
4.0
Value for money
5.0
Customer support
5.0
Functionality
4.0
November 2020
Takes the Guesswork out of Reviewing Emails
Overall great. Their customer service is top notch. I wish I would have discovered this software earlier.
Pros
I heard about this software from a previous employer. We imported a list from this year we were looking to target. Using MailFloss, we were able to exclude 7,000 emails from the marketing list. Those were 7,000 emails that would have gone against us.
Cons
MailFloss is a bit on the pricey side, but it beats over loading email lists. There are lots of options to how you can sort the emails, so the UI can be a bit daunting.
Reasons for Choosing mailfloss
N/A

Response from mailfloss
Replied November 2020
Hi Jack, great review, thank you! Glad to hear we were able to help you with your marketing lists. We're a great value and on the lower end in terms of price in our service category. And I believe our accuracy and feature set make it a no-brainer for many businesses, especially if you are B2C and use one of our supported email service provider integrations. Thanks for trusting us with your email verification needs! Martin
July 2019
Doug from Polymer Clay Tutor
Company Size: 2-10 employees
Industry: Arts and Crafts
Time Used: Less than 2 years
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
4.0
July 2019
Works Seemlessly In The Background
Very Good. Response time when I have questions is fast and effective, which is always a good thing. It gives me a good feeling that the product is well supported and that customers are appreciated.
Pros
Once I configure the features, the app works seemlessly in the back ground to keep my email list nice and clean.
Cons
Unless I missed it, it would be nice to have a preview button to see a list of emails that would get scrubbed/deleted before I actually commit to saying yes. I say this because I initially configured some setting too aggressively and ended up getting rid of some good subscribers that I recognized.

Response from mailfloss
Replied July 2019
Thanks, Doug! I'm really happy to read your review and to hear you are happy with the service. Apologies about the "preview". It's the first option "Manually decide action on invalid emails" but I think at the time you set up your account it wasn't so clear. We've since added tooltips and more documentation to make it more clear. With this option set you first review the emails and decide if you'd like to delete or unsubscribe or ignore them. This is generally a good idea at the beginning until you're comfortable with our results before turning on an auto action, such as auto-unsubscribe. Thanks again for the lovely review!
September 2019
Allen from BWXT Canada Ltd.
Company Size: 1,001-5,000 employees
Industry: Mechanical or Industrial Engineering
Time Used: Less than 2 years
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
September 2019
Happy Camper
Mailfloss makes what was once a time-consuming process much easier. I recommend it to anybody who does e-mail marketing for their business.
Pros
Integration with our mail provider. Automatic removal of bad e-mails. Fast Support.
Cons
It wasn't clear to me that I could close my browser tab when cleaning started; I think this could be improved.

Response from mailfloss
Replied September 2019
Thanks, Allen! I'm happy to read this. We'll clarify the messaging about closing the browser tab. It's not a problem at all to close it once flossing has started.
July 2019
Alexander from CHG
Company Size: 2-10 employees
Industry: Financial Services
Time Used: Less than 12 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
July 2019
Mailfloss gets to the places other cleaners miss
We have huge databases that we constantly turnover and Mailfloss solves the problem of getting banned by email service providers - we have saved so much time and money by running everything though mailfloss.
Pros
Ease of use - we use manual cleaning for now and it's easy to upload files and get results. We love the way the results are stored and the ranking that mailfloss gives the email.
Cons
The speed - it would be epic if you could make it faster! Drag and drop uploading files would be ideal. The rankings of the emails could be simpler.

Response from mailfloss
Replied August 2019
Thanks so much for the kind review, Alexander. I'm happy to hear we're helping you where other email verification services miss the mark. We hear you on the speed, it's something we're constantly improving without compromising quality. We've also made a ton of tweaks and UI improvements lately based on user feedback including a more intuitive dashboard and drag and drop file uploading. I have a huge smile on my face reading that we save you both time and money - what a combo! :)
April 2020

Adam from Velocity6 Media
Company Size: 2-10 employees
Industry: Marketing and Advertising
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
April 2020
Just what I needed
My email list was in need of cleaning to weed out emails that were potentially impacting deliverability. I initially reached out to ask some pre-sales questions and I was impressed with their transparency and responsiveness. I signed up and bought credits, integrated my email provider and started purging my list. The entire process was incredibly simple.
Pros
Mailfloss was easy to use and worked in the exact way I needed. Support handled my questions fast & efficiently and the platform is well priced compared to competitors.
Cons
Nothing in particular. Mailfloss ticked all the boxes for my use case.
Reasons for Choosing mailfloss
I looked at other tools but the responsiveness & transparency of their support a long with the price and simplicity sold me on Mailfloss.

Response from mailfloss
Replied April 2020
Awesome, Adam! So happy to read this. It made my morning. Happy to hear you're satisfied with our price, simplicity, and transparency. You rock!
August 2019

Michael from Pharmaceuticals company
Company Size: 1,001-5,000 employees
Industry: Information Technology and Services
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
August 2019
mailfloss is very convenient
It saves tons of time and improves email deliverability and email ROI without any extra effort on our part
Pros
A set-it and forget-it solution. Mailfoss is the only service I could find that was completely hands-off after an initial setup. I love the fact that I don't have to think about email verification anymore and don't have to review emails or do any more work. It just works and I love the simplicity of it all
Cons
None that I can think of. It seems like they are regularly improving the platform

Response from mailfloss
Replied August 2019
Thank you, Michael! Really appreciate the kind words.
October 2019
Kerri from Mega Events
Company Size: 11-50 employees
Industry: Events Services
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Functionality
5.0
October 2019
Flossing emails hasn't been so easy!
Pros
Easy to use. Daily emails letting us know how many emails they "flossed"
Cons
So far, i haven't found anything i don't like. We have just started using it.

Response from mailfloss
Replied October 2019
Awesome, thanks Kerri. I'm glad flossing has never been so easy for you! That's our goal, to make it so easy that you don't even think about it. Martin
November 2020
Daniel from DogCha!
Company Size: 1 employee
Industry: Computer Games
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
November 2020
Amazing
Excellent
Pros
Easy to sync Easy to use Easy to check Many options to filter support is really fast and effective
Cons
No cons until now. I don't see any cons because it works perfectly.

Response from mailfloss
Replied November 2020
Hi Daniel, thanks so much for your review! Happy to read you enjoy our ease of use and how easy it is to sync your data. I agree ;) And happy to know everything is working perfectly for you, that's great! Martin
August 2019
Dalton from Small Shops Co
Company Size: 2-10 employees
Industry: Marketing and Advertising
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
4.0
August 2019
Great job, MailFloss
Needed an easy way to check email list for deliverability. (Use Case: was doing a deep dive into some non-activated trials to get an idea of what % were non-activated due to mistakes in email, intentionally wrong, or other.)
Pros
-Easy to use -Flexible pricing that works well with just about any use case -Great customer service
Cons
I was going to say, could use some additional features as time goes on... but honestly, for what I wanted to use it for -- it delivered 100% and then some more. So if you need a simple tool to verify email deliverability, spit out reasons associated with that deliverability, and give you some basic visualization/reporting tools -- this gets the job done and then some!

Response from mailfloss
Replied August 2019
Thanks so much for the kind words, Dalton. It's true, we only do email verification. It's what we eat, sleep, and breathe and don't plan on expanding to anything else. Our sole focus is to provide the best and most convenient email verification tool available. We keep getting better thanks to great customers like you.
September 2019

Chris from Konica Minolta
Company Size: 1,001-5,000 employees
Industry: Information Technology and Services
Time Used: Less than 2 years
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
September 2019
One of those services that gets it done in the background
With limited resources this is a great option to improve email deliverability.
Pros
Easy to setup. I like how email checking is put on autopilot after the initial setup.
Cons
It's simple but there a lot of additional options, as well, that can be intimidating. Luckily there are lots of tooltips and their help widget has tutorials and video walk-thrus.

Response from mailfloss
Replied September 2019
Thank you, Chris! I really appreciate your review.
September 2019
Mark from Portland Benefits Group
Company Size: 2-10 employees
Industry: Insurance
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
September 2019
Exceeded all expectations
I would recommend this tool for anyone that needs to manage their email lists. It was easy to set up, support was very quick and resolved my issue (user-error) and had me off to the races must faster than anticipated.
Pros
The integration with our current mailing programs, unsubscribing bad emails and importing directly from my campaigns/lists.
Cons
UI is a little hard to reach in some areas, light blue on a light background.

Response from mailfloss
Replied September 2019
Thanks for your kind review, Mark! It really means a lot. Sorry about that light blue area, that's great feedback and we'll get it fixed.
September 2019
Amit from Cooler Solutions
Company Size: 51-200 employees
Industry: Design
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
September 2019
Saves us a lot of time
I'm quite happy with the Mailfloss service. I would recommend it.
Pros
I loved how fast it was to wire everything up at the beginning, and how it works seamlessly to take care of email verification.
Cons
The reporting could use some work. I'd like to get some graphs on how everything went. This is available now but I have to do some clicking.

Response from mailfloss
Replied September 2019
Thanks for the kind words, Amit! I'm happy to read them. Martin
December 2020
Kunal from Li-Cycle
Company Size: 51-200 employees
Industry: Renewables & Environment
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
December 2020
Great tool to clean up your mailing list!
Pros
Excellent support in getting us up and running. Setup was fast, and mailfloss helps us keep our email list clean and up to date. I like how we never have to remember using it.
Cons
None. Integrating with HubSpot was easy.

Response from mailfloss
Replied December 2020
Thanks for your review, Kunal. I am happy to read that you use mailfloss to keep your email list clean and that you don't have to remember to use it. That's what we strive for.
May 2020

Laurie from LFR Inc
Company Size: 2-10 employees
Industry: Human Resources
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
5.0
Functionality
5.0
May 2020
Helpful Tool to Clean Up Your Email List
Pros
This is a helpful tool to clean up old, inaccurate, invalid, dead and ghost-like emails in your email system. Super-easy integration with ConvertKit.
Cons
No problems integrating the product with ConvertKit. Easy to use.

Response from mailfloss
Replied May 2020
Hi Laurie, thanks for your review, I'm happy to read this. I'm glad you've enjoyed the ease-of-use of our ConvertKit integration :)
October 2020
Russell from ViruSci LLC
Company Size: 2-10 employees
Industry: Biotechnology
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Value for money
5.0
Customer support
3.0
Functionality
5.0
October 2020
Maillfloss Review
Pros
The integrations make it super easy to hit the ground running!
Cons
I have only used the service for a week, no cons to speak of thus far.

Response from mailfloss
Replied October 2020
Hi Russell, happy to hear the integrations are working well for you. That's definitely where we shine and work hard to make them the best in the business!
February 2020
Vojtech from Maternia E-commerce, s.r.o.
Company Size: 11-50 employees
Industry: Information Technology and Services
Time Used: Less than 6 months
Review Source: Capterra
Ease-of-use
5.0
Functionality
5.0
February 2020
Gets your mailing list back to shape
Pros
Mailfloss simply works. It verifies the validity of email addresses on your list with simple integrations into the most used emailing platforms.
Cons
The service is quite English-centric (no localization of the UI, only credit cards supported etc.). But that's not a major issue in our case.

Response from mailfloss
Replied February 2020
Hi Vojtech, thanks for your kind words! I'm happy to read it. And yeah, sorry, we're very English centric at the moment. Our customer base is large and away English speaking and currently our main focus. But I do speak Cantonese and a little bit of Spanish :) Martin