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Most buyers should pick Zulip.
Choose Zulip if your team wants topic-first async chat, open-source self-hosting, or lower entry pricing: Basic is $3.50 per user monthly, while Standard is $6.67 per user monthly with annual billing. Choose Slack if channels, huddles, workflows, and connected-app AI matter more; Pro is $7.25 per user monthly billed annually. Both offer free plans, but Zulip's free cloud plan caps searchable history at 10,000 messages, while Slack's free plan keeps 90 days and allows 10 apps. Zulip's topic model brings a learning curve.
01Side by side
| Zulip | Slack | |
|---|---|---|
| Starting paid price | $3.50/user/month for self-hosted Basic | $7.25/user/month for annual-billed Pro |
| Free plan | 10,000 searchable messages; 5 GB total storage | 90-day history; up to 10 apps |
| Best for | Async, topic-organized teams wanting self-hosting | Teams wanting channels, AI, huddles, and workflows |
| Core strength | Topic-based conversations and threaded replies | Channels, AI tools, huddles, and automation |
| Learning curve | Topic-based workflow has a noted learning curve | No specific learning caveat in published review |
| Integrations and data | Hundreds of integrations; open-source self-hosting | Unlimited app integrations on paid plans |
| Team and seat costs | Plus requires 10 users; Business requires 25 | No seat minimum listed in published pricing |
| Support | Paid plans list priority, email, chat, or phone support | Support terms not listed on the vendor's site |
Zulip Choose Zulip if
- Choose Zulip if async, topic-organized conversations fit your team.
- Choose Zulip if you need open-source self-hosting and data control.
- Choose Zulip if lower published entry pricing matters.
Slack Choose Slack if
- Choose Slack if you want channels, huddles, and workflows together.
- Choose Slack if unlimited paid app integrations are important.
- Choose Slack if you need advanced AI on Business+.
02Pricing compared
Both offer free plans, but the limits differ. Zulip Free Cloud includes 10,000 messages of searchable history and 5 GB total file storage. Slack Free includes 90 days of message history and allows up to 10 apps.
Zulip Standard costs $8 per user monthly, or $6.67 per user monthly with annual billing. Its listed features include unlimited search history, 5 GB of file storage per user, and priority commercial support. Zulip’s self-hosted Basic plan is $3.50 per user monthly; the pricing page does not list an annual rate.
Slack Pro costs $8.75 per user monthly, or $7.25 with annual billing. Business+ is $18 monthly or $15 with annual billing. That makes Zulip’s listed entry prices lower, but the plans are not feature-for-feature equivalents.
03Features and depth
Zulip organizes conversations around topics, with replies kept in context. Its unread inbox gives people an overview of conversations with unread messages, and focused conversations let them view one conversation at a time. That structure suits teams that want to separate discussions without relying on a fast-moving channel feed. Zulip also offers cloud hosting or open-source self-hosting, and says teams can move between the two.
Slack centers work on channels and adds huddles, workflows, Slack Connect for client and vendor messaging, and integrations. Its listed AI features include Slackbot, AI search across company files and conversations, and AI-generated huddle notes. The pricing page lists Basic AI on Free and Pro, and Advanced AI on Business+.
Choose based on how your team works: Zulip emphasizes topic-organized async conversations and self-hosting; Slack offers more listed meeting, automation, external messaging, and AI features. Slack’s broader feature set may cost more: Advanced AI starts on Business+, listed at $15 per user monthly with annual billing.
04Ease of use and learning curve
The main adjustment with Zulip is its topic model. Team members need to add a brief topic to a conversation and learn to follow replies in that context. That structure can help keep discussions organized, but it may feel unfamiliar to teams used to putting everything into channels. Zulip’s review notes a learning curve around topics.
Slack’s channel-based setup may be the more familiar choice for teams already used to channel chat. Its huddles, workflows, AI tools, and connected apps also put more options in the workspace, while some features depend on a paid plan. The practical choice is whether your team prefers Zulip’s topic-first organization or Slack’s channels and broader listed toolkit.
Questions people ask
Is Zulip cheaper than Slack?
At the listed entry prices, yes. Zulip self-hosted Basic is $3.50 per user monthly, and Standard is $6.67 per user monthly with annual billing. Slack Pro is $7.25 per user monthly with annual billing. Compare plan features and hosting needs before treating those prices as equivalent.
Which has the better free plan, Zulip or Slack?
It depends on your limits. Zulip Free Cloud includes 10,000 messages of searchable history and 5 GB total file storage. Slack Free includes 90 days of message history and up to 10 apps, plus 1:1 huddles. Check which cap matters more to your team.
Can Zulip be self-hosted?
Yes. Zulip offers open-source self-hosted software, with Free, Basic, Business, and custom-priced Enterprise options listed. Basic costs $3.50 per user monthly; Business costs $8 monthly or $6.67 with annual billing. The Business plan has a 25-user minimum.
Can a team move from Slack to Zulip?
Zulip says teams can move from other tools, including Slack and Teams, and can move between Zulip Cloud and self-hosting. The published information does not specify migration steps or whether every type of Slack data transfers, so confirm those details before switching.