I began using this software in 2008 after searching for a good multi-tenant front-end for asterisk where small offices can share a single PBX but still be partitioned in a way that they would never be aware of each other and could never accidentally retrieve each-others calls. I quickly discovered that Thirdlane was written in such a way that developers could still get under-the-hood and do the powerful things that needed to be done, or integrate other 3rd party asterisk-based applications, without breaking its structure and design.

Extremely easy to reverse engineer in order to do customization to its framework. The best asterisk-based PBX software for use in a call center. Extremely scalable. Migrate from Single-tenant to Multi-tenant, or vise-versus. Developers really interested in implementing features based on input from their resellers and customers. Cost per seat extremely reasonable and < 10 users is free. Unlike other 'free' applications like *cough* FreePBX *cough* that turns out to not be quite so free after all. Thirdlane will never nickles-and-dime you every time you turn around like some bad app-store application trying to sell you gems and gold.

The current built-in metrics for call center reporting is minimalist in nature. Its easily integrated with queuemetrics but I would like to see the reporting show more information that call center managers need to hire/fire/reprimand their agents.

We use this system for 5+ years in heavy production mode for many our customers. I do not see any competitors in this price_range<->functionality niche. The system extremely flexible and allows you to implement almost any call flow via custom scripting and API. Redundant mode gives you 99.99% of reliability. Asterisk core which is used in all releases is very stable. While ago (in 2012, as I remember) we had a problem with asterisk deadlocks after reload, but this problem was fixed very quickly by their tech support. What I also like in the system - it is not dead - all the time they release new updates and are working on new software and modules. The team is open for collaboration and we had a common project with them: SalesForce integration module. Pricing on software and support are very low in compare to other commercial multitenant PBX systems.

flexibility; stability; ability to write my own scripts; good support

Not the best in the world user interface. Sometimes a little bit slow, but nothing crucial.

Before we paid to representative, we requested him to give us a trial but he refused and boasted about his software. We even paid for 10 hours of support but within few days we found it's one of the worst on the market. Please don't fall for sweat talk of representative. We requested him many times to refund, but he refused.

Only pro is sweat talk of representative, owner of Third Lane

TL is not very user friendly and has lot less features than open source FusionPBX. No documentation available and for everything you need, you to contact them so they can charge you for support.

We have been working with Thirdlane and their staff since 2008. Their product has evolved nicely over the years and allows us to put a high quality service offering in front of our customers. We are very happy with Thirdlane.

A consistent and easy to deploy software platform that works great for our customers. Professional user portal that gives the end users an intuitive tool to manage their own call routing, voicemail, and sending of faxes. Easy for our support team to view end user accounts and phone registration. I love that special calling scripts can be added at any time and allow us to meet most of our customer's crazy expectations

not too many cons

We have been using the Thirdlane PBX software for over 8 years and have been more than satisfied with their support, reliability, and feature set. Overall an excellent product.

Robust software. Well designed, very flexible and reliable. We hope our competition never learn about it.