Carly vs Stilla: Which AI Teammate Fits Your Team?
Stilla is an AI teammate your whole company tags in Slack, Teams, Linear and GitHub. On September 9 it announced it is joining Meta. Carly is an AI assistant and agent builder that works inside your email, calendar and the apps your business runs on.
Both act for a team, not just one person. They start the work in different places.
The quick answer: Stilla if your team lives in Linear and GitHub and wants an agent that writes the code. Carly if the work that piles up is the follow-up, the scheduling, the CRM and the status posts, and you want it to start on its own when something happens. Free Zapier-style workflows; AI agents from $35/month.
Carly vs Stilla at a glance
| Carly | Stilla | |
|---|---|---|
| Built for | Email, calendar, CRM, team workflows and agents | Product and engineering teams in Slack, Linear and GitHub |
| Starts work | On an event, a schedule or a request | On an @mention, a schedule or an event |
| Sends from your own Gmail or Outlook | Drafts and sends through connected mail, or you email it | |
| Meetings | Turns notes from Granola, Fathom, Fireflies or Zoom into follow-ups | Records from its own desktop app |
| Code | Reviews new PRs and triages new issues | Writes code and opens PRs |
| Connects to | Thousands of apps | 3,000+ tools plus MCP |
| Team size | Individuals to teams | Up to 29 members on Team; more on Enterprise |
| Owner | Independent | Joining Meta (announced Sep 9, 2026) |
| Pricing | Free workflows; agents from $35/mo | From $25/mo per organization, credit-based |
What Stilla is built for
Stilla’s examples come from product teams. Mention @Stilla on a Linear issue and it writes the spec, breaks out subtasks and updates the status. Tag it on a GitHub pull request and it reviews the code, suggests fixes and opens its own PR. Record a standup with its desktop app and the decisions come back as proposed tickets and Slack updates. Everyone shares one Stilla, so it carries context from one thread to the next.
Automations sit on top: describe a job in plain English and Stilla runs it on a schedule or on events in Slack, GitHub, Linear, email and webhooks, with permissions scoped to specific channels and repos.
What Carly is built for
Carly’s day starts in your inbox. Connect Google or Microsoft and it triages, drafts replies in your voice and sends them from your address. It finds times and moves meetings on your real calendar, with booking pages for the people who need to grab a slot. Every request carries through: the deal moves in HubSpot, the task lands in Linear, the meeting note lands in the Carly CRM.
Then there are workflows. A Slack message, a new GitHub issue, a finished Zoom recording, an email from a key account, a form submission, a Monday at 8am: each can start a run with an AI step in the middle, and nobody has to tag anything. The agents you build run those workflows for the whole team.
Where the work starts
This is the real difference. Stilla is built around a mention: someone in the team sees the thread, tags @Stilla, and approves the proposal.
Carly is built around the event. Josh runs a five-person product studio. When a client emails a change request at 9pm, Carly drafts the reply from Josh’s address, files the request as a Linear ticket, posts a summary in the client’s Slack channel and holds 30 minutes on the right designer’s calendar. In the morning Josh approves the reply. Nobody had to see the email first to tag anyone.
Both shapes work. Mentions suit a team that already talks through everything in Slack. Events suit work that arrives from outside the team, from clients, leads, vendors and calendars.
Meetings
Stilla records meetings itself. Carly works with the recorder you already use. Connect Granola by MCP, Fathom, Fireflies or Zoom’s AI Companion, and each recap becomes follow-up emails, Linear tickets and notes on every attendee’s CRM record. If you liked Stilla’s botless recording, Granola records the same way.
Code
Stilla’s coding agent writes the change and opens the pull request. Carly’s GitHub workflows work around the code: a first-pass review comment when a PR opens, a label, priority and owner suggestion when an issue opens, and a Slack post when something needs eyes. Teams that want an agent writing the code can pair Carly with a coding agent like Devin.
The Meta question
Stilla says it will keep serving customers, and nothing has been switched off. The team now works on Meta Business Agent, Meta’s agent for merchants on WhatsApp, Messenger and Instagram. The announcement gives no roadmap, timeline or migration plan for the Slack, Linear and GitHub product. If your team is choosing a tool to build its operations on for the next few years, that uncertainty belongs on the scorecard. What Stilla is and what the deal means has the details.
Pricing
Stilla’s Team plan starts at $25 per organization a month for 20,000 credits, or $20 billed yearly, and the price rises with the credit pool. It covers up to 29 members, with up to $100 in free credits to start. Enterprise is priced by sales.
Carly runs Zapier-style workflows free. AI agents start at $35 a month. Get started here.
Which should you choose?
- You want an agent tagged on Linear issues that writes code and opens PRs: Stilla, or a coding agent like Devin
- You want follow-ups, scheduling and CRM updates sent from your own accounts: Carly
- You want work to start on its own when an email, a Slack message or a meeting recording arrives: Carly workflows
- You want one agent configured once for a whole team: Carly agents
- You want a tool that is not changing owners: Carly
The wider field, including Viktor, Dust, Claude Tag and Granola, is in Stilla alternatives.
FAQ
Can I use Carly and Stilla together?
Yes. Some teams keep Stilla in the repo and use Carly for email, calendar and the CRM. Carly connects to Slack, Linear and GitHub, so both can work from the same tickets and channels.
Does Carly work in Slack like Stilla?
Carly workflows start when a message is posted in a Slack channel you choose, answer in the thread, and post briefs, digests and alerts. Carly also reaches you by text, email, the web, the Carly plugin in ChatGPT and the Carly connector in Claude. Set up a workflow here.
Is Carly cheaper than Stilla?
They price differently. Stilla charges per organization by credit pool, from $25 a month, and every task draws on the pool. Carly’s Zapier-style workflows are free, and AI agents start at $35 a month. Which comes out lower depends on how much of your team’s work is AI and how much is routine workflow steps.
What happens to my Stilla data after the Meta deal?
Stilla’s current site says it does not train models on customer data and is SOC 2 Type II certified. The acquisition announcement does not address data terms, so watch Stilla’s privacy policy and terms of service for changes.
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See what people say
"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
