ALL TOOLS
289 curated software tools across 21 categories. No marketing hype. Just the facts.
Quassel IRC
OPEN SRCDistributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core.
Robust IRC
OPEN SRCIRC without netsplits. Distributed IRC server, based on RobustSession protocol
The Lounge
OPEN SRCHost and control your own modern web IRC client.
UnrealIRCd
OPEN SRCModular, advanced and highly configurable IRC server written in C for Linux, BSD, Windows, and macOS
Weechat
OPEN SRCFast light and extensible IRC client for the terminal
Asterisk
OPEN SRCEasy to use but advanced IP PBX system, VoIP gateway and conference server
Flexisip
OPEN SRCComplete, modular and scalable SIP server, includes a push gateway, to deliver SIP incoming calls or text messages on mobile device platforms where push notifications are required to receive information when the app is not active in the foreground
Freepbx
OPEN SRCWeb-based open source GUI that controls and manages Asterisk
FreeSWITCH
OPEN SRCScalable open source cross-platform telephony platform
FusionPBX
OPEN SRCWeb interface for multi-platform voice switch called FreeSWITCH
Kamailio
OPEN SRCThe modular SIP server for building scalable VoIP and real-time communication platforms.
openSIPS
OPEN SRCSIP proxy/server for voice, video, IM, presence and any other SIP extensions
Routr
OPEN SRCLightweight SIP proxy, location server, and registrar for a reliable and scalable SIP infrastructure.
SIP3
OPEN SRCSee, solve, and secure every VoIP call.
SIPCAPTURE Homer
OPEN SRCMonitor, troubleshoot, and analyze every VoIP call with clarity.
Wazo
OPEN SRCFull-featured IPBX solution built atop Asterisk with integrated Web administration interface and REST-ful API
Yeti-Switch
OPEN SRCTransit class4 softswitch(SBC) with integrated billing and routing engine and REST API.
Akkoma
OPEN SRCFederated microblogging server with Mastodon, GNU social, and ActivityPub compatibility
chasquid
OPEN SRCSMTP (email) server with a focus on simplicity, security, and ease of operation
Courier MTA
OPEN SRCFast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services
EmailRelay
OPEN SRCA small and easy to configure SMTP and POP3 server for Windows and Linux.
Haraka
OPEN SRCFast, highly extensible, and event driven SMTP server
HyperKitty
OPEN SRCBrowse, search, and participate in GNU Mailman 3 web archives
Mailman
OPEN SRCManage electronic mail discussion and e-newsletter lists
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HOW WE REVIEW SOFTWARE
Every tool in the VentureGaps directory is evaluated through comprehensive research, verified user feedback, and data-driven analysis. We assess pricing transparency, feature depth, user satisfaction, and integration capabilities. Our ratings reflect real-world usage patterns and publicly available data — not paid placements. The directory is continuously updated to reflect the latest changes in pricing, features, and market positioning.
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