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OpenTalk

opentalk.eu

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Spec score 8.9 #3 of 22 in Web and Video Conferencing - Enterprise Software

What it is

OpenTalk is a browser-based video conferencing service available as a hosted service or for installation in a customer's data center. It runs in common browsers without local software, although Safari on Apple devices has functional limitations. Meetings can use breakout rooms and sub-room conversations, with multiple moderators, a whiteboard, meeting minutes, polls and surveys. Open and secret voting are supported, with results documented. Participants can join by phone for audio-only access, and OpenTalk can connect to in-house phone systems or external SIP providers. Open APIs support integrations, and Keycloak is an identified single sign-on option. Its on-premises APIs cover user and room provisioning, configuration, metrics and reporting. OpenTalk describes itself as open source and GDPR-compliant, and reports receiving the German Federal Office for Information Security IT security label for video conferencing services. Starter is free, with up to five participants and 30-minute calls, but no recording. Standard is $7.50 a month per user, excluding VAT; Premium is $12.50 a month per user, excluding VAT. Both paid plans include recording.

Spec sheet

What it does
OpenTalk is a browser-based video-conferencing platform for business, education, public-sector and provider use.Read 14 Oct 2026 · opentalk.eu
Product
OpenTalk is a browser-based video conferencing solution offered as an online service or as an installation in the customer's own data center.Read 2 Oct 2026 · opentalk.eu
Intended users
The company says OpenTalk provides what businesses, political organizations, authorities and schools need.Read 2 Oct 2026 · opentalk.eu
Integrations
Open APIs support integration with existing platforms and products, and the company identifies Keycloak as an SSO option.Read 2 Oct 2026 · opentalk.eu
Support
The pricing page lists FAQ support for Starter and email support for Standard and Premium.Read 2 Oct 2026 · opentalk.eu
Headquarters
Berlin, GermanyRead 28 Sep 2026 · opentalk.eu
API and SSO
Open APIs expose platform functions, while Keycloak provides single sign-on integration.Read 14 Oct 2026 · opentalk.eu
Audit-proof voting
The platform supports documented open and secret votes designed to provide an audit trail.Read 14 Oct 2026 · opentalk.eu
Breakout rooms
Moderators can create breakout rooms randomly, by moderator count or participant group, and move between them.Read 14 Oct 2026 · opentalk.eu
Browser access
Users can join meetings through a browser without installing local software.Read 14 Oct 2026 · opentalk.eu
Browser support
OpenTalk runs in common browsers without local software installation; the feature page says Safari on Apple devices has functional limitations.Read 2 Oct 2026 · opentalk.eu
Documentation scope
The documentation site is divided into user, admin, developer and release sections, with installation and API material.Read 14 Oct 2026 · docs.opentalk.eu
Hosting location
The pricing FAQ says its IT infrastructure and video conference servers are operated with Heinlein Hosting in two Berlin data centers.Read 2 Oct 2026 · opentalk.eu
Licence
The community source release is licensed under the European Union Public Licence (EUPL).Read 14 Oct 2026 · opentalk.eu
Limit: bandwidth and audio
Mailbox users reported poor audio and video on weak connections, microphone noise suppression concerns and difficulty selecting a separate conference audio output.Read 14 Oct 2026 · userforum.mailbox.org
Limit: dashboard bugs
Mailbox forum users reported meetings not appearing correctly, deletion and editing failures, and old meetings cluttering the dashboard.Read 14 Oct 2026 · userforum.mailbox.org
Limit: missing collaboration features
The independent test noted no reaction buttons and no ability to move moderation tools, participant lists or chat into separate windows.Read 14 Oct 2026 · davidlohner.de
Limit: moderation workflow
The same test found moderation controls hard to discover and no quick way to grant a guest moderator rights.Read 14 Oct 2026 · davidlohner.de
Limit: OMR reviewer
The reviewer reported dashboard bugs, screen-sharing layout not returning after sharing, mobile optimization needs and account requirements for voting.Read 14 Oct 2026 · omr.com
Limits
The Starter plan allows 10 conference rooms, calls up to 30 minutes, and up to 5 participants; recording is not included.Read 2 Oct 2026 · opentalk.eu
Maker company facts
LinkedIn lists OpenTalk as a self-owned Berlin company founded in 2021 with 11–50 employees.Read 14 Oct 2026 · linkedin.com
Maker legal entity
The contractual provider for opentalk.eu services is OpenTalk GmbH.Read 14 Oct 2026 · opentalk.eu
Mobile app status
OpenTalk currently has no native mobile app; mobile users access it through a browser.Read 14 Oct 2026 · docs.opentalk.eu
Moderation and collaboration
Features include breakout rooms, sub-room conversations, multiple moderators, an interactive whiteboard, meeting minutes, polls and surveys.Read 2 Oct 2026 · opentalk.eu
Multiple moderators
Meetings can assign several moderators who divide moderation work and remain after the meeting for off-boarding.Read 14 Oct 2026 · opentalk.eu
On-premises APIs
The on-premises offering documents REST APIs for user and room provisioning, configuration, metrics and reporting.Read 2 Oct 2026 · opentalk.eu
Open source
OpenTalk describes itself as open source, with auditable code and free community use.Read 2 Oct 2026 · opentalk.eu
Outlook availability limit
The Outlook add-in is currently unavailable on the hosted meet.opentalk.eu service and is intended for on-premises installations.Read 14 Oct 2026 · docs.opentalk.eu
Outlook integration
The Outlook add-in creates, edits and deletes OpenTalk meetings and inserts join links into calendar events.Read 14 Oct 2026 · docs.opentalk.eu
Owner group
LinkedIn states that OpenTalk is backed by the Heinlein Group.Read 14 Oct 2026 · linkedin.com
Phone access
Participants can join by telephone for audio-only access, and OpenTalk can connect as a SIP client to an in-house telephone system or external SIP provider.Read 2 Oct 2026 · opentalk.eu
Praise: independent test
A January 2026 test with about 30 participants reported no meaningful software-caused stutters, dropouts or errors.Read 14 Oct 2026 · davidlohner.de
Praise: OMR reviewer
The reviewer praised stable larger meetings, extensive moderation and collaboration tools, browser access without installation, and suitability as a privacy-focused Zoom or Teams alternative.Read 14 Oct 2026 · omr.com
Rating on OMR Reviews
4.0 out of 5 from 1 review.Read 14 Oct 2026 · omr.com
Release news
Version 25.4.6, announced 10 March 2026, improved frontend security, controller stability, SIP integration and Outlook add-in behavior.Read 14 Oct 2026 · opentalk.eu
REST API
The documented REST API can create rooms and automate OpenTalk actions after OAuth authentication through Keycloak.Read 14 Oct 2026 · docs.opentalk.eu
Scalability
Its container architecture is presented as supporting hundreds of simultaneous conferences and very large participant counts.Read 14 Oct 2026 · opentalk.eu
Security and compliance
OpenTalk says its service is GDPR-compliant and reports receiving the German Federal Office for Information Security IT security label for video conferencing services.Read 2 Oct 2026 · opentalk.eu
Security certification
The German BSI awarded OpenTalk its IT Security Label for video-conferencing services in July 2024.Read 14 Oct 2026 · opentalk.eu
Security reporting
OpenTalk provides a vulnerability-reporting process and permits testing with a personal test account while prohibiting DDoS, phishing, brute-force and other abusive tests.Read 14 Oct 2026 · opentalk.eu
Self-hosting
OpenTalk can be deployed in an organisation's own data center using Docker and Kubernetes technologies.Read 14 Oct 2026 · opentalk.eu
SIP integration
OpenTalk connects Cisco Room Kits and desk phones through SIP, Asterisk and its Obelisk bridge to WebRTC.Read 14 Oct 2026 · opentalk.eu
Streaming integration
Streaming can send conference output to services such as YouTube or Twitch using RTMP or RTMPS.Read 14 Oct 2026 · opentalk.eu
Sub-conferences
Participants can open private sub-rooms while continuing to follow the main conference.Read 14 Oct 2026 · opentalk.eu
System requirements
The FAQ lists Windows 10/11, macOS 12+, supported Linux distributions, Chrome 89+, Edge 89+, Firefox 89+, Chrome Android 112 and iOS/iPadOS Safari 14.5 as minimum browser environments.Read 14 Oct 2026 · docs.opentalk.eu
Voting
OpenTalk provides open and secret voting and documents vote results.Read 2 Oct 2026 · opentalk.eu
Whiteboard and minutes
OpenTalk includes collaborative whiteboard and in-meeting protocol functions.Read 14 Oct 2026 · opentalk.eu

Plans and prices

Starter Free 10 conference rooms · 30-minute maximum call length · 5 participants · 100 MB storage · FAQ support Read 2 Oct 2026 · opentalk.eu
Starter Free free 10 conference rooms · 30-minute calls · 5 participants · 100 MB storage · no recording · FAQ support Read 14 Oct 2026 · opentalk.eu
Standard €7.50 a month 7.50€ per user monthly, price excl. VAT Unlimited rooms · 240-minute calls · 50 participants · recording · 1 GB storage · breakout rooms · email support Read 14 Oct 2026 · opentalk.eu
Standard (monthly) $7.50 a month Per user; price excl. VAT. Unlimited conference rooms · 240-minute maximum call length · 50 participants · recording · 1 GB storage · email support Read 2 Oct 2026 · opentalk.eu
Premium €12.50 a month 12.50€ per user monthly, price excl. VAT Unlimited rooms · unlimited call length · 200 participants · recording · 10 GB storage · breakout rooms · subroom audio · voting · streaming · telephone dial-in · email support Read 14 Oct 2026 · opentalk.eu
Premium (monthly) $12.50 a month Per user; price excl. VAT. Unlimited conference rooms · unlimited call length · 200 participants · recording · 10 GB storage · email support Read 2 Oct 2026 · opentalk.eu
Standard €75 a year 75€ per user annually, price excl. VAT Unlimited rooms · 240-minute calls · 50 participants · recording · 1 GB storage · breakout rooms · email support Read 14 Oct 2026 · opentalk.eu
Standard (annually) $75 a year Per user; price excl. VAT. Unlimited conference rooms · 240-minute maximum call length · 50 participants · recording · 1 GB storage · email support Read 2 Oct 2026 · opentalk.eu
Premium €125 a year 125€ per user annually, price excl. VAT Unlimited rooms · unlimited call length · 200 participants · recording · 10 GB storage · breakout rooms · subroom audio · voting · streaming · telephone dial-in · email support Read 14 Oct 2026 · opentalk.eu
Premium (annually) $125 a year Per user; price excl. VAT. Unlimited conference rooms · unlimited call length · 200 participants · recording · 10 GB storage · email support Read 2 Oct 2026 · opentalk.eu
Custom Priced on request Upon request Custom features · on-premises hosting available Read 14 Oct 2026 · opentalk.eu

Every OpenTalk plan and price →

Strong points and limits

Strong points

  • Hosted service and self-hosted installation options
  • Breakout rooms, polls, surveys and multiple moderators
  • Open and secret voting with documented results
  • Phone access and SIP connections
  • Open APIs and Keycloak SSO option

Limits

  • Starter calls are limited to 30 minutes
  • Starter supports up to five participants
  • Starter does not include recording
  • Safari on Apple devices has functional limitations

Who it suits

OpenTalk may suit businesses, political organizations, authorities and schools that need video meetings, voting or moderation tools. Its hosted and self-hosted options provide different deployment choices.

Verdict

OpenTalk combines conferencing with structured meeting tools, including voting and moderation. The free tier has limits on call length and participants, while recording is included in paid plans.

Where Specifiction places it

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