shouldiuse.io

VERDICT

Should I use Zulip?

Zulip is an organized team chat app for distributed teams of all sizes. - zulip.com

Depends. Buy if your distributed team or community drowns in chat noise and will commit to the topic-threading model. Skip if you want a frictionless Slack clone or casual real-time chat.

Confidence

Medium. Based on 40+ public sources: G2, Capterra, Reddit, Hacker News, CVE databases, and official Zulip pages.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityNo direct support-quality evidence found
  • Security posture

Pricing

$0

Cloud Free

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
Cloud Standard$6.67/user/mo
PlusSee plans page

Best for

  • Distributed teams drowning in chat noise
  • Open-source communities
  • Async-first remote orgs
  • Buyers wanting self-hosting and data control

Not for

  • Teams wanting a drop-in Slack replacement with zero onboarding
  • Small teams needing quick casual chat — threading is overkill
  • Real-time social or gaming communities better served by Discord
  • Self-hosters without time to patch security releases promptly

Gotchas - check before you buy

high

Self-hosters own updates: 2025-26 brought auth-bypass and info-disclosure CVEs

medium

Self-hosted support plans now cost money; some users found new pricing disappointing

medium

New joiners churn during the topic-model adjustment period; plan onboarding time

low

Cloud Free's exact limits aren't confirmed in sources; verify caps before committing

Pros and cons

Pros

  • Topic threading keeps conversations organized; users consistently praise it
  • 100% open source with free self-hosting and full data access
  • Cheap paid tier: Cloud Standard runs $6.67/user/month
  • Free cloud plan; users call it affordable for civic groups
  • Proven at scale: Imperial College London runs 10,000+ users

Cons

  • Learning curve: it 'takes a bit of time to get used to'
  • Topic model is polarizing; some users love it, others bounce
  • New self-hosted pricing changes disappointed long-time users
  • Recurring CVEs mean self-hosters must patch promptly

Sources & method

Analyzed 9/20/2026 - 12 sources - Active security program (HackerOne disclosure, prompt releases), but multiple CVEs landed in 2025-26 including an authentication bypass.

official x2review x4security x3news x3
  • CVE-2025-31478: authentication bypass, A bug in the Zulip server allowed authentication bypass; fixed in a security release.
  • CVE-2026-25742: information disclosure, Authorization bypass vulnerability in Zulip Server.
  • CVE-2026-26058: crafted export tarball issue, A crafted export tarball causes the server to copy unintended data.

Key stats

  • Value for money: 4/5

    Rating

  • $0

    Starting price

  • 12

    Sources

  • Analyzed

  • Value for money: 4/5. Free tier, cheap cloud, free self-hosting
  • Ease of use: 3/5. Thread model praised but has learning curve
  • Feature depth: 4/5. Organized topics, open source, scales to 10k+
  • Support quality. No direct support-quality evidence found
  • Security posture: 3/5. Active HackerOne program; several patched CVEs
  • $6.67/user/mo Cloud Standard cheapest paid tier
  • Yes Free tier Cloud Free plus free self-hosting
  • 117 G2 reviews Kandra Labs seller profile
  • Foundation-owned Ownership Zulip Foundation owns Kandra Labs

Pricing

Cloud Free

$0

  • Free Zulip Cloud plan
  • For communities and small groups

Cloud Standard

$6.67/user/mo

  • Full Zulip Cloud features
  • Unlimited history per source snippet

Plus

See plans page

  • Higher cloud tier
  • Listed alongside Standard

Security

Active security program (HackerOne disclosure, prompt releases), but multiple CVEs landed in 2025-26 including an authentication bypass.

  • CVE-2025-31478: authentication bypassA bug in the Zulip server allowed authentication bypass; fixed in a security release.³
  • CVE-2026-25742: information disclosureAuthorization bypass vulnerability in Zulip Server.
  • CVE-2026-26058: crafted export tarball issueA crafted export tarball causes the server to copy unintended data.

What users say

Reviewers consistently praise Zulip's organized, threaded conversations and pricing while admitting an adjustment period versus Slack.

“Great product with great features and pricing”
Capterra review
“It is the best chat system. I've used Microsoft Teams, Slack,”
Capterra Canada review
“I honestly have no complaints about Zulip.”
Software Advice review

Alternatives

Compare Zulip with each alternative.

  • Slack

    Slicker, more integrations, but no free self-hosting

    Zulip vs Slack

  • Discord

    Better for free-flowing real-time community chat

  • Mattermost

    Open-source, Slack-like; less topic structure

Companies that use it

  • Imperial College London11
  • WindBorne
  • Semsee
  • Atolio
Full analysis

Based on 40+ public sources: G2, Capterra, Reddit, Hacker News, CVE databases, and official Zulip pages.

Great for async, thread-loving distributed teams and open-source communities; skip if you want a zero-learning-curve Slack clone.

Methodology

Based on 40+ public sources: G2, Capterra, Reddit, Hacker News, CVE databases, and official Zulip pages.

Sources

  1. Zulip plans and pricingzulip.com
    official
  2. Zulip security pagezulip.com
    security
  3. CVE-2025-31478 - NVDnvd.nist.gov
    security
  4. Zulip Server 12.2 security releaseblog.zulip.com
    security
  5. Zulip Reviews on G2g2.com
    review
  6. Zulip Reviews on Capterracapterra.com
    review
  7. Zulip 11.0 discussion on r/selfhostedreddit.com
    review
  8. New plans for self-hosted Zulip customers - Hacker Newsnews.ycombinator.com
    news
  9. Zulip - Crunchbasecrunchbase.com
    news
  10. Rust community case studyzulip.com
    official
  11. Zulip market share - 6sense6sense.com
    news
  12. Zulip customer reviews - FeaturedCustomersfeaturedcustomers.com
    review

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