7 Composio Alternatives (and How to Just Email Your Agent)
Composio is the tool layer for AI agents. It handles the part every agent project stalls on: managed OAuth end to end, granular permission scoping, inline auth triggered by user intent rather than pre-configuration, and intent-based tool resolution across 1,000+ apps — Gmail, Slack, GitHub, Linear, Notion, Stripe, Sentry, Vercel, and the rest. Complex work comes back as a proposed execution plan with guardrails, and multi-step runs get remote ephemeral sandboxes with navigable filesystems. It’s model and framework agnostic, and MCP support means Claude Code and Cursor can drive it directly.
Current pricing: free covers 20,000 tool calls a month, $29/month covers 200,000 with overages at $0.299 per 1,000, and $229/month covers 2 million at $0.249 per 1,000, with Enterprise adding a dedicated SLA, SOC 2, and VPC or on-premises deployment. A pricing change was announced for August 15, so re-check before you model anything.
It’s genuinely good at what it does. Which is why the two reasons people search for alternatives are worth separating.
You’re asking one of two different questions
“I want a different tool layer.” Fair, and there are real differences underneath — per-user OAuth delegation, open source and self-hosting, embedded UI for your customers, unified data models versus per-app actions. Options one through six cover that.
“I want someone to be able to reach the agent.” This one isn’t a tool-layer problem at all, and swapping Composio for Arcade won’t touch it. Composio and every alternative below it give your agent hands. None of them give it a front door. The agent you built can call Salesforce beautifully and there is still no way for a customer, a colleague, or a vendor to ask it for anything — because reaching it means going through code you wrote.
If that’s the gap, you don’t need to replace your tool layer. You need an address people can write to. That’s option seven, and plenty of teams run it alongside Composio rather than instead of it.
1. Arcade.dev
Built exclusively for agent tool calls, and the strongest answer if per-user authorization is your binding constraint. Auth events and tool calls are separate primitives, which sounds like a billing detail and is actually an architecture statement: it treats “this specific user authorized this specific agent to do this specific thing” as the problem worth getting right.
vs. Composio: deeper on delegated authorization and auditing at enterprise scale, with SSO, RBAC, and audit logs, and deployment into Arcade Cloud, your VPC, or air-gapped. Pricing is the clearest on this page — free gives 2,000 auth events and 2,000 tool calls a month with no card; Team is $25/month plus $0.10 per auth event and $0.01 per tool call; Enterprise bundles custom rates with a 24/7 SLA.
Best for: multi-tenant products where each end user authorizes the agent individually.
2. Nango
Open source, 11,200+ GitHub stars, 900+ APIs, and the most control on this page. Two-way data syncs, managed auth, a proxy that injects credentials automatically, webhook handling, custom integration functions, and OpenTelemetry observability throughout.
vs. Composio: it does more than tool calling. Syncs and unified APIs sit alongside actions, so the same platform covers “keep this data current” and “let the agent do something,” which Composio leaves to you. Free is $0 for 10 connections, 100k proxy requests, and 10 compute hours; Starter starts at $50/month for 20 connections; Growth at $500/month for 100 connections and 1M requests; Enterprise is custom. Usage adds $1 per extra connection and $0.0001 per proxy request. Self-hosting removes the vendor question entirely.
Best for: teams who want observability, data sync, and the option to run it themselves.
3. Paragon
Embedded iPaaS. The distinguishing feature is that the integrations look like part of your product rather than part of someone else’s — a Connect Portal UI your users configure inside your app, or a headless version if you want to build the interface yourself.
vs. Composio: aimed at your customers rather than your engineers. ActionKit gives agents natural-language access to the apps your users already connected, on top of 130+ pre-built connectors with custom connectors for anything else. Fewer connectors than Composio, far more polish on the end-user connection experience. Customers include AI21, OpenPhone, and Pipedrive.
Best for: B2B SaaS shipping customer-facing integrations that need to feel native.
4. Pipedream Connect
The widest catalog in the category at 2,800+ apps, with serverless workflows you can drop Python or JavaScript into when a connector doesn’t do quite what you need.
vs. Composio: more of a workflow platform with an agent story attached than an agent tool layer with workflows attached. The code blocks are the real advantage — arbitrary logic between steps, no waiting on a vendor to expose an action. The embedded, customer-facing side is less finished than Paragon’s out of the box.
Best for: breadth of app coverage plus arbitrary code in the middle.
5. Merge
The unified-API approach, and philosophically the opposite of per-app tool calling. One normalized model per category — accounting, ATS and recruiting, CRM, file storage, HR and payroll, ticketing — so you write against “a candidate” once instead of against Greenhouse, Lever, and Ashby separately.
vs. Composio: it collapses the long tail instead of exposing it. Merge Agent Handler lets agents take authenticated actions across enterprise connectors with scoped permissions and audit logs, and Merge Gateway routes LLM requests with fallbacks and spend controls. The trade is expressiveness: normalized models hide app-specific fields your agent might need.
Best for: enterprise SaaS where category coverage matters more than per-app depth.
6. Direct MCP servers
Skip the middle layer. A growing number of vendors publish their own MCP servers, and your agent can speak to them directly.
vs. Composio: no platform fee, nothing counting your tool calls, no third party holding tokens. You also inherit everything Composio was doing for you — OAuth flows per vendor, refresh handling, rate limits, retries, and a different reliability posture for every server. Fine for five integrations, painful at fifty. Worth auditing which of your targets already ship one before paying for coverage you don’t need.
Best for: a small number of integrations with well-maintained official servers.
7. Carly, if you want to email the agent
Not a tool layer, and not a Composio replacement — the layer above it. Carly is a finished agent that arrives with an email address already attached.
That’s the thing none of the six above provide. People email it, CC it on a live thread, or forward it something to deal with, and it replies from inside email on any device. No SDK for the other side, no app to install, no endpoint to document. A customer can write to it. So can a vendor, a candidate, or the colleague who will never open your dashboard.
- Your domain, your brand. Add a sending domain in the org portal, drop in a verification TXT record plus three DKIM CNAMEs and the SPF row it walks you through, forward the mailbox, verify. It then sends DKIM-signed mail as
assistant@yourcompany.com— so it reads as your company, not a tool you subscribe to. - It already has the integrations. Around 260 apps connect natively across CRM, calendar, accounting, support, and project management, and anything else with a public API connects with your own key, pasted on the integrations page. Threading, reply matching, and loop prevention are handled rather than assembled.
- Scoped tool access per agent, plus memory across the thread and the relationship, and scheduled runs alongside inbound triggers.
- Free, unlimited Zapier-style workflows underneath for the deterministic steps.
Where it doesn’t apply: if you’re building your own agent loop and want tools inside it, that’s Composio’s job, and it’s good at it. These stack — keep the tool layer, add the front door.
Driving Carly from your own code — provisioning agents per tenant, embedding it in your product, running high volume — is available. Book a call with the team and we’ll scope it to your setup.
Pricing: free for unlimited Zapier-style workflows, AI agents from $35/month.
Best for: when the missing piece is a way for humans to reach the agent.
Choosing between them
Per-user OAuth is the hard part. Arcade.dev, on delegated authorization and audit.
You want to own the infrastructure. Nango — open source, self-hostable, with syncs and observability included.
Your customers configure the integrations. Paragon, for the embedded Connect Portal.
You need the widest catalog and custom code. Pipedream Connect.
You want one model per category, not one per app. Merge.
You have five integrations and they all ship MCP servers. Use them directly and skip the layer.
Nobody outside your team can reach the agent you built. Carly, alongside whatever tool layer you keep. That gap doesn’t close by switching vendors at the same altitude.
Composio remains a strong default for the tool layer itself, and “we outgrew it” is much rarer than “we were solving a different problem.” Diagnose which one you have before migrating anything.
FAQ
What is Composio?
Composio is an integration and tool-calling platform for AI agents. It provides managed OAuth end to end, granular permission scoping, inline auth triggered by user intent, and intent-based tool resolution across 1,000+ apps, plus remote ephemeral sandboxes for multi-step work and guardrails on execution plans. It’s model and framework agnostic and supports MCP clients like Claude Code and Cursor.
What is the best Composio alternative?
For per-user OAuth delegation and enterprise auditing, Arcade.dev. For open source and self-hosting with data syncs included, Nango. For customer-facing embedded integrations, Paragon. For the widest app catalog with custom code, Pipedream Connect. And if the actual gap is that nobody can reach your agent, Carly — which arrives with an email address rather than an SDK.
How much does Composio cost?
Free covers 20,000 tool calls a month. Paid runs $29/month for 200,000 calls with overages at $0.299 per 1,000, and $229/month for 2 million at $0.249 per 1,000. Enterprise adds a dedicated SLA, SOC 2, and VPC or on-premises deployment. A pricing change was announced for August 15, so confirm current rates before forecasting.
Can I use Composio and an email agent together?
Yes, and it’s a common setup. They sit at different altitudes: Composio gives an agent you’re building tools and auth, while an email-native agent like Carly gives people a way to reach an agent without touching your code. Teams often keep the tool layer for the product-embedded agent and add an email address for the internal and customer-facing work around it.
Do I need an integration platform at all?
Not always. If you have a handful of targets and they publish official MCP servers or clean APIs, calling them directly costs nothing and removes a dependency. Integration platforms earn their fee at scale — dozens of apps, per-user OAuth, token refresh, rate limits, and retries across vendors with wildly different reliability. Count your actual integrations before paying for a thousand.
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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.
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