Can I open-source Pumble?
YES · mature open-source replacementYes. Rocket.Chat Community (46k stars), Discourse (44k stars), Mattermost Team Edition (39k stars) are mature open-source replacements for Pumble — self-host with real ops work and stop paying $2.99/mo.
People still pay for Pumble because community software is valuable when members are already there and the operator does not have to own realtime reliability and abuse response. The recurring cost buys realtime delivery, notifications, abuse handling, search, media, permissions, mobile clients, backups, and community operations, not just the visible interface.
xcross-platform apps, push, guest access, admin controls, and hosted reliability
xnetwork effects
xnative mobile apps
xvideo and voice infrastructure
xenterprise moderation and discovery
These projects already replace it, free.
RRocket.Chat CommunitySlack-shaped chat for up to a hundred concurrent users; MongoDB and upgrades are now yours.open source↗MMattermost Team EditionFull self-hosted team chat for under 250 users; free software, non-free evenings.open source↗ZZulipChannels become streams and every conversation gets a topic; async teams usually call that an upgrade.open source↗What each one is, in full: Rocket.Chat Community · Mattermost Team Edition · Zulip
all 5 open-source alternatives to Pumble →· no votes, no pay-to-list · just what's real
Pumble pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| free | $0/workspace | $0/workspace | Unlimited users, message history and channels; 10 GB storage/workspace; 1:1 meetings; 3 third-party integrations plus Clockify and Plaky |
| pro | $2.99/user | $2.49/user | 10 GB storage/paid seat; 10 integrations; group meetings |
| business | $4.99/user | $3.99/user | 20 GB storage/paid seat; unlimited integrations; meeting recording; 5 free single-channel guests per paid seat |
| enterprise | $7.99/user | $6.99/user | 100 GB storage/paid seat; SSO and retention controls |
| cake.com bundle | $15.99/user | $12.99/user | Pumble plus Clockify and Plaky; charged once per unique user across the bundled products |
free tierunlimited users, messages and channels; 10 GB/workspace; 1:1 meetings; 3 external integrations plus Clockify and Plaky
billingmonthly + annual
hidden costsOwners, admins, members and multi-channel guests count as paid seats; deactivated users do not. Business includes 5 free single-channel guests per paid seat, but multi-channel guests are paid. Bundle billing counts each unique user across the included apps.
verified 2026-08-12 · source ↗
Can I open-source Pumble?
Yes. Rocket.Chat Community replaces Pumble today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Pumble cost?
Pumble costs about $2.99/month (Pro, checked 2026-07-31), which is $35.88 per year. That's what you save by replacing it with open source.
What do I lose by replacing Pumble?
Honestly: cross-platform apps, push, guest access, admin controls, and hosted reliability; network effects; native mobile apps; video and voice infrastructure; enterprise moderation and discovery. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Pumble?
Yes: Rocket.Chat Community (Slack-shaped chat for up to a hundred concurrent users; MongoDB and upgrades are now yours.) Mattermost Team Edition (Full self-hosted team chat for under 250 users; free software, non-free evenings.) Zulip (Channels become streams and every conversation gets a topic; async teams usually call that an upgrade.) All 5 curated open-source alternatives are at caniopensourceit.online/pumble/alternatives.