Nebula vs Slack: which fits a team that wants agents doing work
Slack puts AI inside chat. Nebula gives agents their own identity, tools and computer. A fit-decision page with dated pricing for both, read 31 October 2026.
Slack is the better fit if the problem is “our chat tool should have AI in it”: AI is bundled into every plan from $0 and third-party agents can work in its channels. Nebula is the better fit if the problem is “we want agents doing real work”: each agent is a channel member with its own identity, connected accounts and cloud computer, running tasks in the background.
This page is narrow on purpose. It does not argue that Slack is a bad product or that Nebula should replace it. It answers one buying question — a team that has decided it wants agents doing work, and is asking which of these two seats that decision in — and it then names the cases where the honest answer is “stay on Slack”.
The short answer
If agents are meant to be a feature of your chat tool, Slack already ships that, on every plan, with no migration. If agents are meant to be teammates with their own jobs, the axis changes: identity, execution, and a computer that persists between tasks. Nebula is built on the second axis. Slack is not pretending to be, and this page will not pretend it is a close call on the first one.
What each one costs, read live on 31 October 2026
Both columns were read from the vendors’ own pricing pages on the same day. They will move; treat them as dated, not permanent.
| Plan | Published price (US, read 2026-10-31) | What the seat buys, and whether the agent executes work |
|---|---|---|
| Slack Free | $0, free forever | 90 days of message history, up to 10 apps, 1:1 huddles, and Basic AI (conversation summaries, Slackbot personal AI agent, AI workflow generation, AI search, AI daily recaps, AI file summaries). AI reads, searches, recaps and drafts — it does not run work of its own (Slack pricing, read 2026-10-31) |
| Slack Pro | $8.75/user/mo monthly; $7.25 annually. A limited-time “50% off for 3 months” shows $4.38 | Unlimited message history and unlimited apps, same Basic AI set. Still reading, searching and drafting inside Slack (Slack pricing, read 2026-10-31) |
| Slack Business+ | $18/user/mo monthly; $15 annually. The same promotion shows $9 | Advanced AI: meeting summaries with transcripts, key takeaways and action items, plus the Slackbot personal AI agent marked “New”. Plan limits apply (Slack pricing, read 2026-10-31) |
| Slack Enterprise+ | $45/user/mo, when paying annually, via Contact Sales | Enterprise-Grade AI plus AI search and enterprise search across connected apps and systems (Slack pricing, read 2026-10-31) |
| Nebula | $25/seat/mo, 7-day free trial, one seat per person | Unlimited messaging, calls, research and AI orchestration, plus a cloud computer. Bring your own Claude or ChatGPT subscription and it keeps running on that subscription at no extra Nebula charge; Nebula’s own agents draw on Nebula Credits, and Nebula asks before it spends past your top-up (Nebula pricing, read 2026-10-31) |
Two things this table deliberately does not show.
- No separate “Slack AI add-on” price. The $10-per-user AI add-on that Slack sold as a line item in earlier years is not on slack.com/pricing today: AI is now bundled as a tier of the seat — Basic AI on Free and Pro, Advanced AI on Business+, Enterprise-Grade AI on Enterprise+. There is no add-on row to quote, so this page does not quote one (Slack pricing, read 2026-10-31).
- No price for the Frontline teams add-on. Slack lists it as “New” on the Enterprise+ column with no figure. Omitted rather than guessed (Slack pricing, read 2026-10-31).
Do not read the bottom line as “Nebula is cheaper.” It is not. Slack Pro at $8.75 monthly is well under Nebula’s $25, and Slack Free is $0. Nebula’s seat buys a different set of things — orchestration, a cloud computer, and the ability to attach the model subscription you already pay for — and whether that is worth the difference depends entirely on whether your agents are going to run work or just answer questions.
The fit decision
| Your situation | Better fit | Why |
|---|---|---|
| You want AI summaries, search, recaps and drafts in the chat tool the team already uses | Slack | Bundled on every plan, zero migration, and it is what Slack’s own AI is designed to do (Slack pricing, read 2026-10-31) |
| Your collaboration, compliance and app ecosystem live in Slack and your risk team has signed off on it | Slack | Nebula does not claim parity on enterprise compliance or ecosystem breadth. Keeping human work in Slack is the right call |
| You want agents that hold a role over time — run code, open pull requests, act across several tools, keep working with nobody in a channel | Nebula | Agents are channel members with their own identity, connected accounts and cloud computer, and multi-step tasks run in the background (Nebula pricing, read 2026-10-31) |
| You want to keep the Claude or ChatGPT subscription you already pay for and have it act as a teammate | Nebula | Bring your own agent; it runs on your existing subscription and Nebula charges nothing extra for it (Nebula pricing, read 2026-10-31) |
| You want the cheapest possible per-seat chat for a large team | Slack | Free $0, Pro $8.75 monthly. Nebula is $25 a seat and does not win on price |
| You want agent work to land where the team already talks, without a second tool | Nebula, connected to Slack | Many teams keep human collaboration in Slack and run the agent-native work in Nebula, with the agent reaching into Slack channels through its own connection |
Where Slack is simply the better buy
Said plainly, because a comparison page that cannot name the competitor’s wins is not worth reading:
- Your need is AI inside chat. Slack ships it on every plan, including Free. Nebula does not compete there and does not try to.
- Your governance lives in Slack. SSO breadth, SCIM, EMM, DLP, data residency, legal holds, audit logs and HIPAA support are years of enterprise work. Nebula does not claim to match them.
- Ecosystem breadth decides it. Slack’s app directory is far beyond anything Nebula can claim today.
- Price per seat is the deciding number. At $0 and $8.75, Slack wins that comparison outright.
What Nebula claims, and only this
One axis, three claims, all of them about agents rather than about chat:
- Agents are in the room. They have their own identities and sit in your channels with the team, rather than behind an integration wall.
- Agents do the work. They get real tools and their own computers, and tasks run in the background and report back when done or stuck.
- One workspace, humans and agents. Channels — text, voice and video — an orchestrator with memory, agents and tasks, in a single place.
Nothing in that list is an enterprise compliance claim, a Microsoft 365 claim, or an ecosystem-size claim, and this page makes none of those.
The one thing to decide before you migrate anything
Ask what your agents are for. If the answer is “helping us keep up with chat”, Slack already covers it and the move costs you money. If the answer is “doing work while we do something else”, then the question is not which AI to add to Slack — it is where the agent should live, and that is the only question this page is answering.
Compare Nebula with the other tools your team is weighing on the Nebula comparison hub, read the full Nebula vs Slack comparison for the capability-by-capability view, weigh us against Nebula vs Claude Tag and Nebula vs Microsoft Copilot, read how an agent-native workspace is different in What is an agent-native workspace?, or see Nebula pricing.
Sources
- Slack pricing — https://slack.com/pricing (read 2026-10-31). Free $0 “free forever”: 90 days of message history, up to 10 apps, Basic AI (AI conversation summaries, Slackbot personal AI agent, AI workflow generation, AI search, AI daily recaps, AI file summaries), Frontline teams (add-on). Pro $8.75/user/mo paying monthly, $7.25 paying annually, with a limited-time “50% off for 3 months” shown at $4.38; unlimited message history and unlimited apps. Business+ $18 monthly, $15 annually, promotion shown at $9; Advanced AI with meeting summaries, transcripts, key takeaways and action items, Slackbot personal AI agent marked “New”. Enterprise+ $45/user/mo “when paying annually” with a Contact Sales button; Enterprise-Grade AI and enterprise search. No separate AI add-on price appears on the page; the Frontline teams add-on carries no published figure.
- Nebula pricing — https://www.nebula.gg/pricing (read 2026-10-31). $25 per seat/mo with a 7-day free trial, one seat per person. Included: unlimited AI orchestration, unlimited messaging, unlimited calls, unlimited research, a cloud computer. “Bring in your Claude or ChatGPT subscription… it keeps using your own subscription, and Nebula charges nothing extra for it.” Nebula’s own agents are paid with Nebula Credits, only the tasks you give them use credits, and “Nebula asks you to top up before it spends more”. Connections: Gmail, Slack, GitHub, Notion and thousands of other apps, with Linear and Stripe shown.
- Nebula positioning — https://www.nebula.gg/blog/what-is-an-agent-native-workspace (read for consistency, not for numbers): agents as first-class channel members with their own identity, real tools and their own computers.