ToolVitals
💬

Communication

Chat, video conferencing, async communication

156 tools across 13 use cases

Team Chat

Team messaging, communities, and async communication tools.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
Rocket.Chat Top Pick
The Secure CommsOSâ„¢ for mission-critical operations
OSI-approved OSS
45.9k stars Active 100
02
Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
OSI-approved OSS
38.6k stars Active 100
03
Element
Enterprise communication platform
OSI-approved OSS
13.3k stars Active 98

Proprietary targets

Replacement targets, not open-tool picks

01
Discord
Voice and text chat for communities
Active 90
02
nodyx
Self-hosted community platform with forum, chat, voice, and canvas.
Active 85
03
Natively
Natively - Free open-source AI interview copilot & meeting assistant. The best Cluely alternative, Final Round AI alternative, and Interview Coder alternative. Real-time transcription, undetectable stealth mode, local RAG, BYOK. No subscriptions. No data breaches.
Warning 80

3 tools are on Evidence Watch.

Transactional Messaging

SMS, email, push, and transactional notification APIs.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
OpenWA Top Pick
Self-hosted WhatsApp API gateway.
OSI-approved OSS
12.1k stars Active 89
02
WPPConnect
WPPConnect is an open source project developed by the JavaScript community with the aim of exporting functions from WhatsApp Web to the node, which can be used to support the creation of any interaction, such as customer service, media sending, intelligence recognition based on phrases artificial and many other things, use your imagination
OSI-approved OSS
3.4k stars Active 88
03
Wraps
AWS Email, SMS, and CDN tools.
OSI-approved OSS
51 stars Active 86

Proprietary targets

Replacement targets, not open-tool picks

01
Novu
The open-source notification infrastructure. In-app Inbox component, E-mail, SMS, Push and Slack Integrations.
Active 98
02
Open BSP API
Open-source WhatsApp Business platform.
Warning 58
03
Amberize
Desktop app for GoBD-compliant email archiving.
Critical 33

1 tool is on Evidence Watch.

Email Clients & Webmail

Email clients and webmail interfaces for reading, organizing, and sending email across one or more inboxes.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
thunderbird-android Top Pick
Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)
OSI-approved OSS
13.8k stars Active 96
02
eGroupware
Web-based groupware server for calendars, contacts, webmail, and project collaboration.
OSI-approved OSS
295 stars Active 96
03
Bulwark Mail
Self-hosted JMAP webmail client for modern mail servers.
OSI-approved OSS
884 stars Active 93

Proprietary targets

Replacement targets, not open-tool picks

01
EmailThing
Web app for receiving and sending emails.
Warning 57

Video Conferencing

Video meetings, conferencing, webinars, and calling tools.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
LiveKit Top Pick
SFU and SDKs for high-performance, scalable WebRTC
OSI-approved OSS
20k stars Active 94
02
Meet
Open source video conferencing app powered by LiveKit. Built with Django and React.
OSI-approved OSS
2.2k stars Active 90
03
Jitsi Meet
Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.
OSI-approved OSS
29.7k stars Active 87

Proprietary targets

Replacement targets, not open-tool picks

01
Memoir AI
Open-source enterprise meeting intelligence platform.
Critical 43

Telephony & PBX

Phone system software for SIP/VoIP calling, call routing, voicemail, and PBX operations.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
dograh Top Pick
Open-source voice agent platform.
OSI-approved OSS
5k stars Active 96
02
FS PBX
Open-source PBX platform for business telephony and VoIP deployments.
OSI-approved OSS
220 stars Active 93
03
Kamailio
Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms, focusing on flexibility, security and scalability
OSI-approved OSS
2.9k stars Active 89

Proprietary targets

Replacement targets, not open-tool picks

01
FastAICC
Open-source AI call center solution with FreeSWITCH and LLM support.
Critical 39

1 tool is on Evidence Watch.

Self-Hosted Email Server

Self-hosted mail server stacks for deploying and managing SMTP, IMAP, webmail, DNS, and related email infrastructure.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
gromox Top Pick
Groupware backend supporting mail and calendar protocols.
OSI-approved OSS
247 stars Active 88
02
Modoboa
Mail hosting made simple
OSI-approved OSS
3.5k stars Active 88
03
Mailu
Self-hosted mail server stack packaged as Docker images.
OSI-approved OSS
7.4k stars Active 86

Proprietary targets

Replacement targets, not open-tool picks

01
Mail-in-a-Box
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
Critical 52

Booking & Reservations

Tools for booking shared spaces, resources, rentals, or appointments and managing reservations, availability, and rental workflows.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
TymeSlot Top Pick
Open-source meeting scheduling platform.
OSI-approved OSS
159 stars Active 91
02
Cal.com
Open-source scheduling infrastructure
Open core
46.8k stars Warning 76
03
CloudMeet
Open-source Calendly alternative running on Cloudflare's free tier. Meeting scheduler with Google Calendar and Outlook sync.
OSI-approved OSS
510 stars Critical 46

Proprietary targets

Replacement targets, not open-tool picks

01
Calendly
Scheduling automation platform
Active 93

Event Management

Tools for planning and running events, conferences, hackathons, registration, ticketing, CFPs, scheduling, and speaker workflows.

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Open/source-visible picks

Health-first ToolVitals score, then adoption

01
Hitobito Top Pick
Web app for managing complex group hierarchies, members, events, and more.
OSI-approved OSS
475 stars Active 84
02
tickets
Minimalist and private ticket sales platform.
OSI-approved OSS
10 stars Warning 82
03
Togather
Open-source community management and event platform.
OSI-approved OSS
5 stars Warning 66

Proprietary targets

Replacement targets, not open-tool picks

01
OpenBoxOffice
Open-source ticketing platform.
Critical 42

Email Aliasing & Forwarding

Tools for creating email aliases, masks, and forwarding addresses to protect privacy and route mail to real inboxes.

Open ranking →

Open/source-visible picks

Health-first ToolVitals score, then adoption

01
MailX Top Pick
Audited open-source email aliasing service.
OSI-approved OSS
60 stars Active 86
02
AnonAddy
Anonymous email forwarding service.
OSI-approved OSS
4.8k stars Active 78
03
Anon.li
Email aliasing and zero-knowledge encrypted file sharing.
OSI-approved OSS
7 stars Warning 61

File Storage & Sharing

Tools for storing, organizing, syncing, and securely sharing files across users or teams.

Open ranking →

Open/source-visible picks

Health-first ToolVitals score, then adoption

01
LocalSend Top Pick
An open-source cross-platform alternative to AirDrop
OSI-approved OSS
86.1k stars Warning 67

Proprietary targets

Replacement targets, not open-tool picks

01
FileSpread
Browser-based peer-to-peer file sharing web application.
Critical 48
02
Quickdrop
File sharing app with expiring links, uploads, and auto-delete.
Critical 47

Email Aliasing & Forwarding

Tools for creating email aliases, masks, and forwarding addresses to protect privacy and route mail to real inboxes.

Open ranking →

Open/source-visible picks

Health-first ToolVitals score, then adoption

01
SimpleLogin Top Pick
The SimpleLogin back-end and web app
OSI-approved OSS
6.9k stars Active 86

Temporary Email

Services for creating disposable inboxes and temporary email addresses.

Open ranking →

Open/source-visible picks

Health-first ToolVitals score, then adoption

01
MoEmail Top Pick
Temporary email service.
OSI-approved OSS
2.8k stars Warning 55

Learning Management Systems

Platforms for hosting, delivering, and managing online courses, learners, instructors, and course content.

Open ranking →

No scored tools in this use case yet.

1 tool is on Evidence Watch.