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OpenTalk

Berlin, Germany

What it is

OpenTalk is a browser-based video conferencing solution available as an online service or an installation in a customer's data center. It runs in common browsers without local software installation, though Safari on Apple devices has functional limitations. Meetings can include breakout rooms, sub-room conversations, multiple moderators, an interactive whiteboard, minutes, polls, and surveys. Voting may be open or secret, and vote results are documented. Participants can join by telephone for audio-only access; OpenTalk can also connect as a SIP client to an in-house phone system or an external SIP provider. Open APIs support integration with existing platforms and products, and Keycloak is identified as an SSO option. The company describes OpenTalk as open source and GDPR-compliant, and reports receiving the German Federal Office for Information Security IT security label for video conferencing services. Its servers and IT infrastructure are operated with Heinlein Hosting in two Berlin data centers. Starter is free and allows five participants, calls up to 30 minutes, and ten conference rooms, without recording. Standard costs $7.50 a month per user, excluding VAT; Premium costs $12.50 a month per user, excluding VAT.

For and against

For

  • Runs in common browsers without local installation.
  • Supports open and secret voting with documented results.
  • Telephone and SIP options provide audio participation.
  • Offers online service or customer data-center installation.
  • OpenTalk describes itself as open source.

Against

  • Safari on Apple devices has functional limitations.
  • Starter limits calls to 30 minutes and five participants.
  • Starter does not include recording.

The verdict

OpenTalk offers browser-based conferencing with collaboration tools and options for telephone access or on-premises use. The free Starter tier has limits on call length and participants and does not include recording.

Who it suits

OpenTalk may suit businesses, political organizations, authorities, and schools looking for browser-based meetings or an on-premises installation. Its meeting tools include voting, polls, and breakout rooms.

Plans and prices

Starter

Free

10 conference rooms · 30-minute calls · 5 participants · 100 MB storage

Standard

€7.50a month

Unlimited rooms · 240-minute calls · 50 participants · recording

Standard

€75a year

Unlimited rooms · 240-minute calls · 50 participants · recording

Premium

€12.50a month

Unlimited rooms · unlimited call length · 200 participants · recording

Premium

€125a year

Unlimited rooms · unlimited call length · 200 participants · recording

Standard (monthly)

$7.50a month

Unlimited conference rooms · 240-minute maximum call length · 50 participants · recording

Premium (monthly)

$12.50a month

Unlimited conference rooms · unlimited call length · 200 participants · recording

Standard (annually)

$75a year

Unlimited conference rooms · 240-minute maximum call length · 50 participants · recording

Premium (annually)

$125a year

Unlimited conference rooms · unlimited call length · 200 participants · recording

Every plan, in full

On the record

API and SSO
Open APIs expose platform functions, while Keycloak provides single sign-on integration.opentalk.eu · read 14 Oct 2026
Audit-proof voting
The platform supports documented open and secret votes designed to provide an audit trail.opentalk.eu · read 14 Oct 2026
Breakout rooms
Moderators can create breakout rooms randomly, by moderator count or participant group, and move between them.opentalk.eu · read 14 Oct 2026
Browser access
Users can join meetings through a browser without installing local software.opentalk.eu · read 14 Oct 2026
Browser support
OpenTalk runs in common browsers without local software installation; the feature page says Safari on Apple devices has functional limitations.opentalk.eu · read 2 Oct 2026
Documentation scope
The documentation site is divided into user, admin, developer and release sections, with installation and API material.docs.opentalk.eu · read 14 Oct 2026
Hosting location
The pricing FAQ says its IT infrastructure and video conference servers are operated with Heinlein Hosting in two Berlin data centers.opentalk.eu · read 2 Oct 2026
Integrations
Open APIs support integration with existing platforms and products, and the company identifies Keycloak as an SSO option.opentalk.eu · read 2 Oct 2026
Intended users
The company says OpenTalk provides what businesses, political organizations, authorities and schools need.opentalk.eu · read 2 Oct 2026
Licence
The community source release is licensed under the European Union Public Licence (EUPL).opentalk.eu · read 14 Oct 2026
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.userforum.mailbox.org · read 14 Oct 2026
Limit: dashboard bugs
Mailbox forum users reported meetings not appearing correctly, deletion and editing failures, and old meetings cluttering the dashboard.userforum.mailbox.org · read 14 Oct 2026
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.davidlohner.de · read 14 Oct 2026
Limit: moderation workflow
The same test found moderation controls hard to discover and no quick way to grant a guest moderator rights.davidlohner.de · read 14 Oct 2026
Limit: OMR reviewer
The reviewer reported dashboard bugs, screen-sharing layout not returning after sharing, mobile optimization needs and account requirements for voting.omr.com · read 14 Oct 2026
Limits
The Starter plan allows 10 conference rooms, calls up to 30 minutes, and up to 5 participants; recording is not included.opentalk.eu · read 2 Oct 2026
Maker company facts
LinkedIn lists OpenTalk as a self-owned Berlin company founded in 2021 with 11–50 employees.linkedin.com · read 14 Oct 2026
Maker legal entity
The contractual provider for opentalk.eu services is OpenTalk GmbH.opentalk.eu · read 14 Oct 2026

The review

OpenTalk is a video meeting service for organizations that need structured discussions, recorded votes or control over where conferencing runs. It is a strong fit for formal meetings and self-hosting requirements; its free tier is too limited for routine group calls, and it does not provide end-to-end encryption.

Overview

OpenTalk combines hosted conferencing with the option to install the software in an organization’s own data center. Its open-source code can be audited, and community use is free. That flexibility will matter most to organizations that want deployment control or need to inspect the software, though self-hosting brings a different operating commitment than using a hosted service.

The company says the service is GDPR-compliant and reports receiving the German Federal Office for Information Security IT security label for video conferencing services. Its infrastructure and conference servers are operated with Heinlein Hosting in two Berlin data centers. The product does not offer end-to-end encryption, a notable limitation for organizations that require that protection.

Key features

Moderated meetings and voting

Breakout rooms, sub-room conversations and multiple moderators help organizers divide a session and manage participation. An interactive whiteboard, meeting minutes, polls and surveys support collaborative work. Open and secret voting with documented results makes OpenTalk particularly suited to formal meetings where participants need a record of decisions.

Joining and integration

Participants can join through common browsers without installing local software, although Safari on Apple devices has functional limitations. Telephone access provides an audio-only route, and OpenTalk can connect as a SIP client to an in-house phone system or an external SIP provider. Open APIs support integration with existing products; Keycloak is identified as an SSO option. The on-premises REST APIs cover user and room provisioning, configuration, metrics and reporting, which gives technical teams a way to connect deployment and administration workflows.

Pricing

OpenTalk uses a freemium model. Starter is free and includes 10 conference rooms, calls of up to 30 minutes, a maximum of 5 participants, 100 MB of storage and FAQ support. Those limits suit small, occasional calls, but the absence of recording and the five-person cap make it a poor fit for regular team meetings.

Standard costs $7.50 a month per user, excluding VAT, or $75 a year per user, excluding VAT. Both billing options include unlimited rooms, calls up to 240 minutes, 50 participants, recording, 1 GB of storage and email support. Standard is the practical step up for organizations that need recorded meetings or groups larger than five; annual billing lowers the stated price compared with paying month to month.

Premium costs $12.50 a month per user, excluding VAT, or $125 a year per user, excluding VAT. It keeps unlimited rooms and recording while raising the participant limit to 200, removing the call-length cap and providing 10 GB of storage. It best fits organizations with larger sessions or meetings that may run longer than four hours. For custom features or on-premises hosting, pricing is custom and arranged through sales.

Platforms

OpenTalk supports web, Windows, macOS, Linux, iOS and Android, and offers self-hosted deployment and APIs. Browser access avoids a local software installation for participants, but Apple users relying on Safari may encounter functional limitations. Telephone access is available for audio-only participation.

Who it's for

OpenTalk makes the most sense for businesses, political organizations, authorities and schools that hold structured meetings, need voting records, or want a hosted or self-managed deployment. Its moderation tools and documented voting serve those needs directly. Small groups can start on Starter, but organizations needing routine recording, more than five participants or calls longer than 30 minutes should budget for a paid plan. Those that require end-to-end encryption should look elsewhere.

Pros and cons

Pros

  • Open and secret voting with documented results supports accountable decision-making.
  • Hosted and self-hosted options let organizations choose how to deploy the service.
  • Telephone access, SIP connectivity and APIs offer routes into existing communication setups.
  • Paid plans include recording, with Standard accommodating 50 participants and Premium 200.

Cons

  • Starter caps calls at 30 minutes and five participants and excludes recording, limiting its usefulness beyond small, brief meetings.
  • End-to-end encryption is not available.
  • Safari on Apple devices has functional limitations.
  • Standard and Premium prices are per user and exclude VAT, which affects the cost for organizations buying multiple seats.

Alternatives

For a broader comparison, see Secure Video Conferencing Software. Choose Microsoft Teams if its free plan’s 100-person meetings, 60-minute group-call limit and 5 GB of cloud storage better suit your group. VSee is another freemium video-conferencing option, with a free plan for one provider and a paid Plus plan at $29 a month.

Webex App may suit groups that want free meetings of up to 100 attendees with a 40-minute limit. Consider Apache OpenMeetings if you want free software with source and binary downloads and no paid plans or usage limits stated. Doxy.me is aimed at providers just starting telehealth, using it infrequently or unable to take on another cost. Choose Jitsi Meet as another free option, or Proton Meet if you want apps whose maker describes them as fully open source for independent auditing. TrueConf is another freemium option with a free server plan offering a perpetual license and up to 1,000 messaging users.

Verdict

OpenTalk is a compelling choice for organizations that need moderated meetings, recorded voting and the choice of hosted or self-managed deployment. Its structured collaboration and decision tools are the clearest reason to choose it. The five-person Starter ceiling, per-user paid pricing and lack of end-to-end encryption are strong reasons to compare alternatives if your meetings are larger, budget-sensitive or require that specific security feature.

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