GetApp offers objective, independent research and verified user reviews. We may earn a referral fee when you visit a vendor through our links.
Our commitment
Independent research methodology
Our researchers use a mix of verified reviews, independent research, and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology.
How GetApp verifies reviews
GetApp carefully verified over 2.5 million+ reviews to bring you authentic software experiences from real users. Our human moderators verify that reviewers are real people and that reviews are authentic. They use leading tech to analyze text quality and to detect plagiarism and generative AI.
How GetApp ensures transparency
GetApp lists all providers across its website—not just those that pay us—so that users can make informed purchase decisions. GetApp is free for users. Software providers pay us for sponsored profiles to receive web traffic and sales opportunities. Sponsored profiles include a link-out icon that takes users to the provider’s website.
Open Source Instant Messaging & Chat Software (2025)
Last updated: April 2025
13 software options
Sponsored
Basic - from $29/month (billed annually) or $35/month (billed monthly) Advanced - from $49/month (billed annually) or $59/month (billed monthly) Expert - from $99/month (billed annually) or $119/month (billed monthly)
Free - up to 3 users, forever! Express - $7/user/month billed annually Standard - $14/user/month billed annually Professional - $23/user/month billed annually Enterprise - $40/user/month billed annually A 15-day free trial is available.
Standard: $0 USD (free) Advanced: $4 USD per person / month Enterprise: $8 USD per person / month Free for non-profits and educational institutions
Team edition: $0 free forever Enterprise E10: $3.25 user/month billed annually Enterprise E20: $8.50/user/month
eXo Platform Enterprise Edition plans: Professional: $5 / user / month (Starting at 100 users) Enterprise: $6 / user / month (Starting at 300 users) Ultimate: $6 / user / month (Starting at 600 users)
Zoho Cliq offers three paid plans - Standard, Professional, and Enterprise. A free plan is also available.
Rocket.Chat offers two pricing plans: Community: A free, self-managed plan designed for small teams. Enterprise: $7/user/month with a minimum of 25 users and $35/agent/month with a minimum of 5 agents.
Zimbra Collaboration Server (ZCS) is sold per user mailbox in bundled packs of 25, 250 and 2,500. Packs are available as annual, multi-year and perpetual software licenses. Open Source Edition Zimbra Open Source Edition is a free email and collaboration solution ideal for individuals or smaller organizations that do not require Zimbra Support, advanced administration, business continuity and only IMAP email on desktops and devices. Special discounts are available for government, education and non-profit organizations.
Try the free-of-charge on-premises for up to 10 users or two-month Trial SaaS version. On-premises version: TeamWox is free for up to 10 users, up to 25 users - 3 400 USD, up to 50 users - 6 700 USD, unlimited - 10 000 USD. SaaS version: Request a free two-month version of TeamWox. At the end of the trial period, you will be able to extend your subscription. The cost is $15 per user per month.
