Lync chat, voice, video, screen sharing, file transfer

Fisil provides Lync software and outsourcing services, primarily in mobile phone and communications software. We deliver the highest quality products and services to our clients.
14 staff work full time on Lync client development.
You can see the results: We release new builds very often, usually weekly, with new features and bug fixes.

Lync on Linux! Deep experience in Lync, file sharing (Dropbox, Azure, etc.), Android, iPhone.

Custom library with rich API on Android. We can do the same on iOS and Linux.

Tired of the crappy MS Lync Mac client? We can port our library to Mac for a big customer.

Our portable sip core means bug fixes on 1 OS benefit all our builds. One for all, and all for one!

Our major benefits over MS clients:

Lync Linux client. We can customize for you. API. Mobile clients do not need special server config. That’s right, server admins don’t enable mobile Lync? Just use Wync! 3 out of 4 sysads recommend Wync.

We are actively developing ALL major Lync features on all our clients. If your company gives us 3 test Lync logins, we can test all features in your environment, and fix any bugs that appear. Need security? We can build a secure client with end to end encryption on Linux. Fisil’s best work is in areas Microsoft will not deliver:

Lync Linux, API library, secure communications.

Lync! Skype for Business

Cross-platform code is easy to maintain.
Lync customized to your need.


Chat, VoIP, File transfer,
Screen sharing!


VoIP, video, chat
(Wync on App Store)


VoIP, chat
(Wync on Google Play)

Fisil's Lync clients are used at

REAL ITUNES REVIEW! "This may not be the best app ever developed, but compared to the crappy stuff Microsoft developed this is the best thing ever existed. If Microsoft is smart enough they should just buy the company."

Sexy Lync clients video


Since our beginnings in 2011, Fisil (now Fisil LLC) has received and complied with 0 (zero) government requests for information.

We have not placed any backdoors into our software, and have not received any requests for doing so.
No warrants have ever been served to Fisil LLC, nor to Fisil LLC principals or employees. No searches or seizures of any kind have ever been performed on Fisil LLC assets.

It's sad that we must put warrant canaries in the USA.