9 Best Composio Alternatives in 2026 for Agent Tool Integrations

Last updated October 15, 2026. Catalog sizes, auth models, MCP endpoints, and prices were checked against each vendor’s docs and pricing pages on that date.

The best Composio alternatives in 2026 are Arcade for per-user authorization, Nango for code-owned tools, and Pipedream Connect for a huge catalog with credit pricing. Merge Agent Handler, StackOne, Paragon ActionKit, Unified.to, Zapier MCP, and Workato Enterprise MCP each beat Composio on a narrower job: inline DLP, enterprise HR connectors, self-host embedded integrations, unified schemas, or staff assistants.

Composio remains a strong default when you want 1,600+ toolkits and a hosted session MCP URL quickly, per the Composio toolkits catalog. Teams look elsewhere when a security review demands tokens never touch the model, when tool logic must live in their own repo, when they need inline data loss prevention, or when agents serve employees through apps the company already governs. This guide sits in the MCP and Agent Protocols hub under the MCP topic. Placement is unpaid, per our editorial standards and disclosure policy.

Every alternative here exposes tools over the Model Context Protocol (MCP) or a tool-calling API, manages OAuth for end users, and published docs we could capture on October 15, 2026. For model routing rather than SaaS tool auth, start with LLM gateways and Portkey vs LiteLLM vs OpenRouter.

9 Best Composio Alternatives at a Glance

Pick a Composio alternative by the constraint that made Composio a poor fit, then compare catalog depth, MCP access, and the cost of one tool call. The table lists each platform’s own catalog claim and entry pricing as of October 15, 2026. Vendors count toolkits, connectors, and actions differently, so treat the catalog column as a rough size signal.

Platform	Best reason to leave Composio	Catalog (vendor count)	MCP access	Entry pricing
Arcade	Per-user auth and VPC options	8,000+ tools	MCP runtime, MIT server framework	Free; Team $25/mo + usage
Nango	Code-owned TypeScript tools	1,000+ APIs and MCPs, 7k tools	Agent session MCP URL	Free; $50/mo pay as you go
Pipedream Connect	Larger API catalog, code steps	3,000+ APIs, 10,000+ tools	Hosted MCP per app	Free in dev; Startup $99/mo
Merge Agent Handler	Inline DLP on every tool call	190+ connectors	Tool Pack MCP endpoint	Free 2,000 credits; Pro $1,000/mo
StackOne	Enterprise HR depth + injection scan	550+ connectors, 34,000+ actions	MCP, A2A, SDK, REST	Free; Team $600/mo
Paragon ActionKit	Embedded + full self-host	59 integrations	ActionKit MCP and REST	Free start; Pro via sales
Unified.to	Unified schemas + huge tool set	43,456 tools, 575 integrations	Regional Streamable HTTP	Grow $750/mo
Zapier MCP	Staff assistants on existing Zaps	9,000+ apps, 40,000+ actions	One server per MCP client	Free 100 tasks; Pro $19.99/mo
Workato Enterprise MCP	Governed multi-step process tools	58 prebuilt servers	Managed MCP servers	Workato customers, quote based

Verdict: Leave Composio for Arcade or Merge when a security review will ask how every call is authorized and logged. Leave for Nango or Paragon when tool logic and deployment must stay under your engineering process. Leave for Zapier MCP or Workato when the agents serve your own staff on accounts the company already governs.

How We Ranked These Composio Alternatives

We ranked alternatives on how well they replace Composio for a product team that needs agents to call real SaaS tools on behalf of real users. Each pick had to expose tools over MCP or a tool-calling API, manage OAuth for end users, and publish docs we could capture on October 15, 2026. Composio itself is the baseline, not a ranked pick.

• Authorization model: per-user OAuth, tokens kept away from the model, and a clear way to revoke access.
• Tool scoping: filters, packs, or sessions that limit which tools an agent can reach.
• Catalog depth: the number and quality of prebuilt tools, plus a path to custom tools.
• Governance: audit logs, data loss prevention, and prompt injection screening.
• Deployment: cloud, VPC, self-hosted, or on-premises options.
• Pricing clarity: a published free tier and a published per-call or per-credit rate.

We did not run paid benchmarks, so there are no star ratings. Catalog counts come from each vendor and use different units, and we flag vendor claims as claims. Ranking order reflects how often each platform is the right next step after Composio for the most common migration reasons.

1. Arcade: Per-User Authorization Without Tokens in the Model

Arcade is the strongest Composio alternative when security reviewers need every tool call to run with the requesting user credentials and no token in the model. Arcade brokers OAuth 2.0 and API keys, then injects them at runtime, so neither the client nor the large language model (LLM) sees them, per the Arcade authorized tool calling docs.

Arcade describes itself as an MCP runtime. Each request carries a project key and a user identity, and Arcade evaluates the intersection of agent and user permissions at execution time, per its runtime guide. The vendor reports a hosted catalog of more than 8,000 agent-optimized tools and integrations with Okta, Microsoft Entra ID, and SailPoint, per its tool calling explainer, and the arcade-mcp framework for custom servers is MIT-licensed.

• Best for: multi-user production agents in regulated companies, and teams that need VPC, on-premises, or air-gapped deployment after outgrowing Composio’s hosted path.
• Pricing (October 2026): Free includes 2,000 tool calls and 2,000 auth events a month; Team is $25 a month plus $0.01 per tool call and $0.10 per auth event, per the Arcade pricing page.
• Watch out for: at $0.01 per call, Arcade Team costs about 33 times Composio’s published $0.0003 own-app overage rate, and the first call to a tool needing OAuth stops for user consent before it can be re-run.

2. Nango: Open-Source, Code-Owned Agent Tools

Nango is the best Composio alternative for engineering teams that want to own tool logic as code and keep the option to self-host. It is open source under the Elastic License, runs integration logic as TypeScript functions on a managed runtime, and works with MCP and LangChain, per the Nango GitHub repository. Nango’s own Composio vs Nango comparison frames the same split: managed catalog versus owned integration code.

Agent sessions are the tool calling interface. Your backend creates a scoped, expiring session that pins connections and allowed tools, and each session exposes its own Streamable HTTP MCP server at an mcp_url, per the agent sessions docs. Sessions cannot be extended once they expire, so short lifetimes become part of your security design.

• Best for: product teams that want version-controlled tools, logs, retries, and rate-limit handling under their own review process.
• Pricing (October 2026): Free covers 10 connections, 10 compute hours, and 10 GB a month; pay as you go is $50 a month with $50 in credits, then $0.29 per connection and $0.72 per compute hour, per the Nango pricing page.
• Watch out for: the nango_proxy meta tool bypasses allow and deny lists, so turn it off for agents that must stay inside a fixed toolset.

3. Pipedream Connect: 3,000+ APIs Behind One MCP Endpoint

Pipedream Connect is the Composio alternative to reach for when you want an even larger app catalog plus Node.js or Python code steps when a prebuilt tool falls short. Each app has its own MCP server, and developers call them on behalf of users through Pipedream Connect, per the Pipedream MCP docs.

Agents connect to https://remote.mcp.pipedream.net/v3 with headers for project ID, environment, external user ID, and app slug, per the developer guide. You can also publish custom tools to a workspace and use them through the same server. Pipedream is now part of Workday, which positions it as the connectivity layer for Workday agents.

• Best for: teams that need more than 3,000 APIs and want code steps without leaving the Connect MCP path.
• Pricing (October 2026): development is free; Startup is $99 a month billed annually or $150 monthly, with 100 external users and 10,000 credits included, then $2 per user and $0.012 per credit, per the Pipedream pricing page.
• Watch out for: credits are metered per 30 seconds of compute, and SSO, SCIM, and HIPAA require the custom Business plan.

4. Merge Agent Handler: Governed Tool Calls for B2B Products

Merge Agent Handler is the Composio alternative for B2B products whose agents touch customer CRMs, health records, or payment systems and need data loss prevention inline. It offers 190+ MCP-ready connectors as of September 2026, per-user authentication, Tool Packs that bound which tools an agent can reach, and an audit trail of every call, per the Merge Agent Handler docs.

The Security Gateway scans every tools/call against entity rules for personal, financial, and health data, plus custom regex rules and plain-English guardrails, and can allow, redact, or block before arguments leave Merge. Teams already on the Merge Unified API reuse the same Link flow and credential store, so they avoid a second authentication system.

• Best for: SaaS vendors shipping agents to enterprise customers who will ask for SOC 2 Type II, ISO 27001, and HIPAA evidence.
• Pricing (October 2026): Free includes 2,000 credits a month with one credit per tool call; Pro is $1,000 a month for 25,000 credits, per the Merge Agent Handler pricing page.
• Watch out for: the jump from free to $1,000 a month is steep for early pilots, and custom internal connectors and SIEM log streaming are Enterprise features.

5. StackOne: Enterprise Connectors With Prompt Injection Defense

StackOne suits teams whose agents work across HR, recruiting, identity, and other enterprise systems, and who want prompt injection screening on every tool response. It claims 550+ connectors and 34,000+ actions, reachable through MCP, Agent2Agent (A2A), Python and TypeScript SDKs, or REST, per the StackOne homepage.

Defender Core, an open-source prompt injection scanner, runs on every plan, and StackOne says its guard catches 89% of malicious tool responses, a vendor figure we did not test. Pricing splits into Gateway plans for your own employees and OEM plans for embedding in a product, per the StackOne pricing page.

• Best for: companies connecting agents to Workday, Greenhouse, SharePoint, and similar systems, for staff or for customers.
• Pricing (October 2026): Gateway Starter is free with 1,000 credits per seat a month; Team is $600 a month with 5,000 credits per seat; OEM Core is free to start.
• Watch out for: Tool Policies, PII redaction, and SAML SSO start on Team, and Starter keeps action logs for only 1 day.

6. Paragon ActionKit: Embedded Integrations You Can Self-Host

Paragon ActionKit is the best Composio alternative for SaaS products that want one API and MCP server for agent actions, plus the option to run the whole platform in their own cloud. ActionKit returns JSON Schema tool definitions per user and executes them with that user’s credentials, per the ActionKit tool calling docs.

The supported integrations page lists 59 integrations as of October 15, 2026, including Salesforce, HubSpot, NetSuite, SAP S/4HANA, and ServiceNow. Paragon adds a white-labeled Connect Portal, webhook triggers, and self-hosting on AWS, GCP, or Azure, per its ActionKit MCP page.

• Best for: B2B SaaS teams that also need managed sync for retrieval-augmented generation (RAG) and embedded workflows from the same vendor.
• Pricing (October 2026): a free platform tier gets you started; Pro and Enterprise are priced through sales and scale with connected users, per the Paragon pricing page.
• Watch out for: the ActionKit catalog is far narrower than Composio or Pipedream, so check that your required apps are on the list before you sign.

7. Unified.to: Unified Schemas Plus 43,000 Raw Tools

Unified.to fits teams that want normalized data models across CRM, HR, and ticketing apps, with a very large MCP tool catalog behind them. Its MCP server carried 43,456 tools as of July 22, 2026, including 8,242 unified tools, across 575 integrations in 32 categories, per the Unified.to MCP v2 post.

Unified.to adopted the stateless 2026-07-28 MCP revision in production on July 28, 2026, and serves US, EU, and AU regional endpoints. A hide_sensitive setting strips names, emails, and phone numbers from tool responses before they reach the model, and SSE was removed on September 23, 2026, so /sse now returns HTTP 410.

• Best for: product teams that need one schema across many vendors in a category and regional data residency.
• Pricing (October 2026): Grow is $750 a month with 750,000 API calls and unlimited connections, then $1.00 per 1,000 calls, with a 30-day free trial, per the Unified.to pricing page.
• Watch out for: a 43,000-tool catalog is too large for any model to load, so you must filter with permissions, tools, or defer_tools.

8. Zapier MCP: 9,000+ Apps for Assistants Your Team Uses

Zapier MCP is the quickest Composio alternative when the goal is an assistant such as Claude, ChatGPT, or Cursor acting across 9,000+ apps your team already connected in Zapier. It exposes 40,000+ actions, signs in with OAuth, and runs on Streamable HTTP only, per the Zapier MCP docs.

Each successful tool call uses 2 tasks from your Zapier plan, and failed calls are free, per the usage and billing docs. Each named MCP client gets one server, and sharing a server with teammates needs a Team or Enterprise plan. Enterprise adds app access controls and action restrictions, per the Zapier pricing page.

• Best for: operations and go-to-market teams that want assistants to act in the same apps their Zaps already use.
• Pricing (October 2026): Free includes 100 tasks a month, or about 50 tool calls; Professional starts at $19.99 a month billed annually for 750 tasks, or about 375 tool calls.
• Watch out for: tools run on the connections inside one Zapier account, which in our reading suits internal assistants better than per-customer product embedding.

9. Workato Enterprise MCP: Governed Process Servers for Staff

Workato Enterprise MCP suits enterprises already on Workato that want agents to run approved business processes, such as onboarding or vendor setup, under each user identity. Verified User Access makes agent actions inherit the signed-in user’s role-based access and audit trail, per the Workato Enterprise MCP page.

The prebuilt server catalog groups servers into process, data and analytics, and app-specific types, such as an Employee Offboarding server spanning Workday, Okta, Slack, and ServiceNow that previews revocations before executing. Workato reported 58 production-ready servers in a July 2026 update, and existing recipe functions can become MCP servers without code.

• Best for: IT, HR, and finance teams that want multi-step process tools with human confirmation, not raw API wrappers.
• Pricing (October 2026): available to Workato customers with Enterprise MCP; we found no public per-call price, so budget through sales.
• Watch out for: the catalog is small next to developer platforms, and the value depends on already running Workato recipes.

Composio vs These Alternatives: What Changes

Composio still wins on published per-call price and a fast path to 1,600+ toolkits, so leave it only when another constraint matters more. Hobby is free with 100,000 own-app tool calls a month, and Pro is $29 a month with $0.0003 per extra own-app call, per the Composio pricing page.

Constraint	Stay on Composio if	Switch to
Catalog speed	You need hundreds of apps behind one session MCP URL	Pipedream Connect or Unified.to for even larger catalogs
Per-user auth review	Connected accounts and toolkit filters are enough	Arcade (token isolation) or Merge (Tool Packs + DLP)
Own the tool code	Custom tools and MCP alongside the catalog are enough	Nango TypeScript functions or Paragon self-host
Inline content screening	You will add your own filters	Merge Security Gateway or StackOne Defender
Agents for employees	You are building a product for customers	Zapier MCP or Workato Enterprise MCP
Cost per call	Volume is high and $0.0003 overage works	Expect $0.01 on Arcade Team or credit metering elsewhere

Verdict: Keep Composio for broad prototypes and high-volume own-app calls. Switch when authorization design, code ownership, inline DLP, or staff-facing governance becomes the binding constraint.

Two patterns that replace a Composio session

Both snippets come from vendor quickstarts. The first opens a Nango agent session as an MCP URL, and the second asks Arcade to authorize a tool for a user before executing it.

# Nango: scoped agent session as MCP server URL
session = nango.create_agent_session(
    end_user_id="user_123",
    allowed_tools=["gmail_list", "gmail_send"],
)
mcp_url = session.mcp_url  # give this URL to the MCP client

# Arcade: authorize, wait for consent, then execute
auth = client.tools.authorize(tool_name="Gmail.ListEmails", user_id=USER_ID)
if auth.status != "completed":
    print(auth.url)
    client.auth.wait_for_completion(auth.id)
client.tools.execute(tool_name="Gmail.ListEmails", input={}, user_id=USER_ID)

Security Risks to Check Before You Switch

Every agent integration platform widens what a model can do with real accounts, so the main risks are over-broad scopes, prompt injection in tool responses, and proxy tools that skip your allow list. Nango’s own docs warn that its proxy tool bypasses allow and deny rules, and Merge built its Security Gateway for this exact gap.

MCP tooling still ships bugs. Our coverage of the ToFu MCP fuzzing study found 253 verified bugs across 118 MCP servers, and broader agent risks sit in our Agent Security topic.

• Bring your own OAuth app: shared vendor OAuth apps are fine for demos, but your own app gives you branded consent and your own rate limits.
• Scope each session: one user, a few tools, and a short lifetime, as Nango sessions and Merge Tool Packs allow.
• Turn off raw proxies: disable any tool that lets the agent call arbitrary endpoints outside the approved list.
• Screen tool responses: emails, tickets, and docs can carry injected instructions, so use Defender, the Merge Security Gateway, or your own filter.
• Keep humans on writes: require confirmation for sends, deletions, and payments, the pattern Workato’s process servers follow.

What We Left Out and Why

• Composio itself: this is an alternatives guide, so Composio is the baseline rather than a ranked pick. Its Hobby tier and 1,600+ toolkits remain competitive when catalog speed is the only constraint.
• LLM gateways: gateways route model traffic, not SaaS tool calls, and are covered in our LLM gateways guide.
• MCP gateways and registries: they govern traffic to MCP servers you already run and do not supply the integrations themselves.
• Activepieces: its MIT-licensed MCP server mainly builds and manages flows, and running a single piece action costs 1 credit per call, per the Activepieces MCP docs. It is a strong open-source automation tool, but a narrower agent tool layer.
• Single-vendor MCP servers: a GitHub or Salesforce server covers one system, while every pick here covers many.

Our Recommendation When Leaving Composio

Start with Arcade when the security review leads, Nango when tool code must live in your repo, and Pipedream Connect when catalog size is still the constraint but Composio pricing or packaging does not fit. Teams building for their own employees should trial Zapier MCP first and graduate to Workato or StackOne Gateway when they need central governance.

Run a two-week pilot with your 10 most-called tools, log cost per call, and test one prompt injection case before you commit. Pair the pilot with AI agent observability tools and the AgentOps tools map so you can see which tools the agent calls and why, and compare runtimes in AI agent frameworks.

Spotted a platform we missed or a price that changed? Send it through our contact page.

Related Guides

Composio is one of six options in our MCP gateway pricing comparison, which puts its tool-call pricing next to gateway meters from Kong, MintMCP, AWS AgentCore Gateway, Docker, and Cloudflare.

• MCP and Agent Protocols hub
• MCP topic
• Agent Security topic
• ToFu finds 253 bugs in 118 MCP servers
• Claude Managed Agents dynamic workflows
• AI agent frameworks compared
• Best LLM gateways for enterprise AI teams
• Portkey vs LiteLLM vs OpenRouter
• AgentOps hub
• AgentOps tools map
• Best AI agent observability tools
• Open source LLM observability
• AI agent evaluation tools
• Editorial standards · Disclosure · Contact

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