Slack vs Zulip
They differ on 6 of the 12 things buyers in this category actually ask about. Here is where, and what each one asks you to give up.
Slack
$8.75/seatThe default team chat tool, with the deepest app directory of any.
Strongest argument
2,600+ integrations — almost anything you run already posts into it
Biggest objection
The free plan hides messages older than 90 days, which quietly makes history unusable
Per-seat price climbs steeply once you need compliance exports and unlimited history.
Zulip
$6.67/seatTopic-threaded chat designed so asynchronous and distributed teams can catch up quickly.
Strongest argument
Every message lives under a named topic, so catching up takes minutes not hours
Biggest objection
Smaller ecosystem and a less familiar interface raise the training cost
The topic model needs a real onboarding push — teams that skip it revert to chaos.
The differences that matter
Where they actually diverge
Only the rows where the two disagree. Everything they both do is listed below.
Cost
What each costs at 50 people
List price only. It ignores add-ons, seat minimums and the cost of the move itself — all of which routinely dwarf the difference below.
Prices are unverified estimates — useful for comparing orders of magnitude, not for budgeting. Confirm the current figure with the vendor before you commit to anything.
Common ground
What both of them do
These will not help you choose — which is exactly why they are worth knowing about before a vendor pitches one as a differentiator.
- External guestsYes
- Voice and videoBasic calls
- SAML single sign-onYes
- EU data residencyNo
- Public APIYes
- Native mobile appsYes
In full
Every pro and con, both sides
Slack
- 2,600+ integrations — almost anything you run already posts into it
- Huddles turn a thread into a call without a scheduling step
- Search and retention controls that hold up at enterprise scale
- The free plan hides messages older than 90 days, which quietly makes history unusable
- Business+ pricing roughly doubles the bill the moment you need SAML or data exports
- Guest and connect seats add up fast when you work with agencies or clients
Zulip
- Every message lives under a named topic, so catching up takes minutes not hours
- Free for open-source and non-profits, cheap otherwise, self-hostable if you prefer
- Genuinely the best fit for teams spread across many time zones
- Smaller ecosystem and a less familiar interface raise the training cost
- Fewer native integrations means more glue code
- Voice and video are thin compared with Slack or Teams
Questions
Slack vs Zulip, answered
Slack or Zulip — which is better?
Neither, in the abstract. Slack suits you if 2,600+ integrations — almost anything you run already posts into it matters most; Zulip if every message lives under a named topic, so catching up takes minutes not hours does. The honest trade-offs are: Slack — Per-seat price climbs steeply once you need compliance exports and unlimited history. Zulip — The topic model needs a real onboarding push — teams that skip it revert to chaos.
Is Slack cheaper than Zulip?
Zulip is cheaper at 50 people — $8.75/seat/mo against $6.67/seat/mo, roughly $4,002 against $5,250 a year. That gap of about $1,248 is rarely the whole story though — add-ons, seat minimums and the cost of migrating routinely outweigh it.
Can we migrate from Slack to Zulip?
Usually yes, and the difficulty depends on history, integrations and headcount far more than on the two products. Data export quality is the thing to check first: ask both vendors what you can take with you before you commit to either. Our questionnaire produces a scoped estimate for the move.
What else should we consider besides Slack and Zulip?
In team communication the other credible options are Discord, Mattermost, Microsoft Teams. Narrowing to two before you have written down your requirements is the most common way to end up with the wrong one.
Do not stop at two