What Slack translation really costs
Three pricing models exist. One charges the whole company, one charges per head, and one charges the workspace a single flat price. The same 30 person team pays wildly different bills under each.
Short answer. Slack's own AI translation needs the Business+ plan at roughly $15 per user monthly, for everyone. Per seat translation apps run $2 to $3 a head. Flat per workspace pricing, which is how Kiki works, starts free and tops out at $49 monthly no matter how many people join. The arithmetic below.
The three pricing models, with a 30 person team
| Model | Example | 30 people pay | At 60 people |
|---|---|---|---|
| Workspace plan upgrade | Slack Business+ AI translation | about $450 monthly | about $900 monthly |
| Per seat app | Typical $2 to $3 per user | $60 to $90 monthly | $120 to $180 monthly |
| Flat per workspace | Kiki Pro | $19 monthly | $19 monthly |
Numbers reflect published pricing as of mid 2026. Slack's plans and third party prices change, so treat the table as the shape of the market rather than a quote.
Why translation is a bad fit for per seat pricing
Per seat pricing makes sense when each seat consumes the product separately. A design tool, a CRM login, a code editor. Translation is not like that. The work happens at the channel level, and its value lands on everyone who reads the channel, whether or not they personally triggered a translation.
So under per seat pricing you end up paying for readers. Hire five people into a translated channel and your translation bill grows five seats, even though the channel translates the same stream of messages it did last month. Teams notice this around the second invoice, usually right after a hiring round.
Flat per workspace pricing matches how the value actually spreads, one price for a channel that everyone reads in their own language.
Where Kiki lands
Free, $0. Automatic, everyone visible channel translation for a small team, plus flag reactions and private "translate for me." No credit card, no trial clock.
Pro, $19 monthly. Unlimited channels, up to four languages per channel, workspace defaults, and a business glossary so product names and acronyms come out the way your company means them. Billed yearly it works out to $190, about two months free.
Business, $49 monthly. Everything in Pro plus mirror channels across languages, the Hey Kiki assistant, brand voice controls, and a translation analytics dashboard. Billed yearly at $490.
Every price is per workspace. A 12 person startup and a 300 person company pay the same, which is the point. Full details on the pricing page, and if you are weighing the built in option first, our honest comparison with Slack's native translation covers exactly where each one wins.
Common questions
How much does Slack translation cost?
It depends on the pricing model. Slack's own AI translation requires the Business+ plan at $15 per user per month billed annually, for the whole company. Per seat translation apps typically charge $2 to $3 per user per month. Flat per workspace apps like Kiki charge one price for everyone, from $0 on the Free plan to $19 monthly for Pro and $49 monthly for Business.
Is there a free way to translate Slack automatically?
Yes. Kiki's Free plan includes automatic, everyone visible channel translation for a small team, with no credit card and no trial clock. It works on every Slack plan, including Slack Free.
Why does per seat pricing get expensive for translation?
Because translation benefits the whole channel, not individual users. Under per seat pricing you pay for every member who might read a translated message, so the bill grows every time the team does, even though the work being done, translating the channel's messages, is the same.
What does Slack's built-in AI translation cost?
Slack includes AI translation on its Business+ plan, which is priced at $15 per user per month billed annually. Because plans apply to the entire workspace, a 30 person team would pay roughly $450 monthly to unlock it, and the feature works one message at a time rather than translating a channel automatically.
What happens to the price when my team grows?
Under flat per workspace pricing, nothing. Kiki's Pro plan costs $19 monthly whether the workspace has 12 people or 300. Under per seat pricing the bill rises with every hire, and under Slack Business+ every new member adds roughly $15 monthly.
Start at zero, stay flat as you grow
Automatic channel translation, one price for the whole workspace.