How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Arcade.dev is the closest alternative for agents that must act strictly as the signed in user, with delegated authorisation and audit built in.
- Pipedream Connect has the widest catalog, at more than 3,000 APIs, plus a raw API proxy for everything not prebuilt.
- Nango suits engineers who want to write and own their integration code, with a free self hosted edition.
- Merge and Paragon come at the problem from unified APIs and embedded product integrations rather than agent tooling first.
- Every platform meters differently (calls, credits, connected users, auth events), so compare cost at your real usage, not headline prices.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Arcade.dev | Agents acting as the signed in user | $25 per month | Yes |
 Pipedream Connect | Widest catalog with an API proxy | $99 per month | Yes |
 Nango | Code first teams owning their integrations | $50 per month | Yes |
 Merge Agent Handler | Governed agent tools for enterprises | $1,000 per month | Yes |
 Paragon ActionKit | Embedding agent actions in a SaaS product | See website | No |
 StackOne | Unified actions across HR and CRM systems | See website | No |
 Zapier MCP | Agent access to the Zapier app universe | $19.99 per month | Yes |
 n8n | Self hosted automation with agent nodes | Free | Yes |
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The best Composio alternatives
Starting price$25 per month
Free planYes
Arcade is the governance first answer to Composio. Its core idea is that an agent should never hold broader access than the human it acts for: authorisation is delegated per user, tools run inside that user's scope, and actions are logged. For enterprises putting agents into email, calendars and internal systems, that model is the product.
Deployment flexibility backs the pitch. Arcade offers hosted, self hosted and even air gapped options, which matters in finance and healthcare environments where a third party cloud holding tokens is a hard sell in a security review.
Pricing starts with a free tier and Team at 25 dollars a month, then meters usage per tool call and per authorisation event. Model your real call volume before committing; agent workloads are spiky, and per call pricing rewards efficient tool design.
What we like- Delegated authorisation means the agent acts within the signed in user's own permissions, never with a service account's wider rights, self host and air gapped deployment options for regulated environments, tool catalog built for MCP and agent frameworks, free tier to start, Team at 25 dollars a month plus usage
Watch out for- Metering mixes per call and per auth event charges, so costs need modelling, catalog is smaller and younger than Composio's or Pipedream's, enterprise leaning roadmap may outpace a small team's needs, newest features land in its own runtime first
Starting price$99 per month
Free planYes
Pipedream Connect takes Pipedream's enormous component library, built over years of workflow automation, and exposes it to agents with per user hosted authentication. If the service your agent needs is obscure, this is the catalog most likely to already have it.
The API proxy is the practical differentiator. When no prebuilt action exists, your agent can still call the underlying API through Pipedream with managed credentials, instead of hitting a dead end. That combination (prebuilt breadth plus a proxy escape hatch) is hard to match.
Connect is free in development, with Startup plans from 99 dollars a month plus external user and credit costs. Price it with your expected connected users, since that meter, not the plan fee, decides the real bill.
What we like- More than 3,000 APIs and 10,000 prebuilt tools, the largest catalog in this list, hosted OAuth with per user credential isolation, a raw API proxy covers services that have no prebuilt component, free development access, and the maturity of the Pipedream platform behind it, now owned by Workday
Watch out for- Startup pricing from 99 dollars a month plus per user and credit costs adds up, the breadth means component quality varies across the long tail, Connect is one product inside a larger workflow platform, so the roadmap serves both, enterprise ownership may reassure or concern depending on your procurement
#3
Nango
Best for: Code first teams owning their integrations
Visit nango.dev
Starting price$50 per month
Free planYes
Nango is the developer control option. Instead of renting a black box catalog, you build integrations as code on Nango's runtime, while Nango handles the painful parts: OAuth flows, token refresh, credential storage and syncs. It is source available, and a free self hosted edition covers auth and proxy scenarios.
That model suits product teams whose integrations are part of their product. When a customer needs a custom field mapping or a slightly different sync, your engineers change code rather than filing a feature request. Current AI coding tools can even build Nango integrations for you, which narrows the effort gap with managed catalogs.
Pricing starts free, with cloud usage based plans from 50 dollars a month. Nango is the pick when Composio's managed approach feels like a ceiling; it is the wrong pick when you wanted never to think about integrations again.
What we like- Source available and self hostable, with a free edition covering auth and proxy use, integrations are TypeScript functions you can read, extend and version, covers more than 1,000 APIs with auth, syncs and tools on one runtime, enterprise options include bring your own cloud deployment
Watch out for- You own more of the integration behaviour, which is power and workload at once, usage based pricing from 50 dollars a month needs tracking as connections grow, teams wanting a fully managed catalog may find it too hands on, the agent tooling layer is younger than its auth core
#4
Merge Agent Handler
Best for: Governed agent tools for enterprises
Visit merge.dev
Starting price$1,000 per month
Free planYes
Merge came to agents from unified APIs: one data model across dozens of HR, recruiting, accounting and CRM systems. Agent Handler is its agent facing product, exposing managed MCP tools with the controls enterprise buyers ask for: scanning of sensitive data in requests and responses, and audit logs of everything the agent did.
That governance posture is the reason to shortlist it. In regulated settings, the question is rarely whether the agent can call the tool; it is whether security can see, restrict and prove what happened. Merge sells exactly that assurance, with published BAA arrangements through its platform contracts.
The pricing tells you who it is for: a free tier for evaluation, then Pro at 1,000 dollars a month in credits. Startups should look up the list; enterprises with compliance sign off to obtain should start here.
What we like- Built on Merge's unified API business, with deep coverage in HR, ATS, accounting and CRM categories, agent traffic controls include sensitive data scanning and full audit logs, enterprise deployment options for regulated environments, free tier exists for evaluation
Watch out for- Pro pricing at 1,000 dollars a month in credits is enterprise money, agent tools and unified data sync are separate products with separate meters, custom connectors sit on Enterprise tiers, overkill for a startup wiring a handful of tools into a prototype
Starting priceSee website
Free planNo
Paragon's ActionKit serves a specific buyer: a SaaS company that wants its own product's AI features to act inside customers' other tools. Agent actions, embedded integration workflows and managed syncs share one platform and one connected user model, so the integrations your customers configure and the actions your agent takes stay consistent.
That is a different job from wiring tools into an internal agent, and Paragon is honest about the focus. Its connector strength is B2B SaaS (CRMs, ticketing, marketing systems), and the embedded experience is designed to live inside your product's UI and brand.
Pricing is per connected user and quoted, hence See website. If you are building a product, model cost per active connected customer; if you are building an internal agent, Arcade or Nango will fit better.
What we like- ActionKit exposes agent actions alongside Paragon's embedded workflows and data syncs in one platform, built for B2B SaaS products whose customers connect their own accounts, connected user identity handled through your product's own authentication, private deployment available on Enterprise
Watch out for- Pricing is quoted per connected user, with no public self serve figure, the platform's centre of gravity is embedded product integrations, not internal agents, advanced features like dynamic field mapping sit on Enterprise, smaller teams may find the sales led process heavy
Starting priceSee website
Free planNo
StackOne unifies actions across the systems B2B products must support, especially HR, recruiting and CRM platforms, and presents them to agents through one gateway. For a software vendor whose customers each run a different HR stack, that normalisation is the expensive problem, and StackOne exists to absorb it.
Its positioning overlaps Merge, and the two are compared often. The practical differences sit in category coverage, the data model, and how much custom logic you can express. Run both against your hardest customer's system before choosing.
Pricing is credit based and sales led, so See website. Also confirm the current state of its AI integration builder, which comparisons noted as early access during 2026; building on a roadmap feature is a risk to price in.
What we like- Prebuilt actions unified across HRIS, ATS, CRM and related systems, an AI integration gateway designed for agent traffic, built for vendors selling into enterprises with many customer systems to support, data sync and agent tooling in one vendor relationship
Watch out for- Its AI integration builder has been in early access, so verify current status before planning around it, pricing is credit based and quoted rather than published, catalog depth concentrates in business systems rather than the long tail of apps, younger platform than Pipedream or Zapier
Starting price$19.99 per month
Free planYes
Zapier MCP lets agents call actions across the thousands of apps Zapier connects, using the connections your account already holds. For teams deep in Zapier, that is an immediate, low effort route to agent tooling without adopting a new platform.
The trade is fit. Zapier actions were designed as workflow steps, and its metering is task based: an enthusiastic agent can burn a plan's tasks quickly. Its controls are those of an automation platform, not an agent governance product, so regulated use belongs with Arcade or Merge.
Zapier plans start at 19.99 dollars a month for Professional, with a free plan for basic use. Treat Zapier MCP as the convenient default you already own, and graduate to a dedicated platform when scoping, audit or catalog depth becomes the bottleneck.
What we like- Opens Zapier's catalog of thousands of apps to agents through MCP, authentication is handled through users' existing Zapier connections, no new vendor relationship if your team already runs Zapier, Zapier's scale and uptime record behind the connection layer
Watch out for- MCP actions consume Zapier plan tasks and limits, so heavy agent use climbs tiers, tool quality depends on the underlying Zap actions, which were designed for workflows, not agents, governance controls are Zapier's, not a dedicated agent security layer, fine grained scoping of what an agent may do is limited compared with Arcade or Merge
#8n8n
Best for: Self hosted automation with agent nodes4.7/5 on
G2 (319 reviews, checked Oct 2026)
Visit n8n.io
Starting priceFree
Free planYes
n8n approaches agents from automation. Its visual workflows can include AI agent steps that call tools, query data and decide next actions, all on infrastructure you can host yourself. For internal agents (triage this inbox, enrich this record, draft this report), that is often exactly the right shape, at zero licence cost.
The self hosting bargain is the familiar one: the software is free, the operations are yours. Credentials for every connected service live on your instance, so its security is your security. Teams comfortable running infrastructure get remarkable value; teams that are not should take the cloud plans or a managed platform above.
Choose n8n when the agent lives inside automations you run for yourself. Choose Composio or its closer rivals when the agent is a product feature acting on your users' accounts.
What we like- Self host the whole platform for free under its fair code licence, hundreds of integrations and a large community template library, AI agent nodes let workflows call tools and models inside automations you control, cloud plans exist if you outgrow self hosting
Watch out for- It is a workflow automation platform first
- Agent tooling is one feature among many, self hosting means your team owns uptime, updates and credential security, per user agent auth for customer facing products is not its design centre, enterprise governance features sit in paid tiers
How we chose
We shortlisted platforms a developer can adopt in October 2026 that give AI agents authenticated tool access to third party apps, the job Composio does. Composio itself is excluded by the nature of the article. We recorded pricing from vendor pages and October 2026 comparisons, marking Paragon and StackOne as See website because both sell by quote. Catalog sizes are vendor claims and are not measured the same way across vendors. We did not test any platform hands on.
How to choose a Composio alternative
Start with who the agent acts for. An internal agent using your company's accounts fits almost anything here. An agent acting inside your customers' accounts needs per user delegated auth, credential isolation and an audit trail, which narrows the field to Arcade, Pipedream Connect, Nango, Merge and Paragon.
Second, list your ten must have apps and check them by name. Catalog totals are marketing numbers; what matters is whether your specific services are present, with the specific actions you need, at the depth you need. Every vendor here has gaps in different places.
Third, model the meter at your expected scale. Tool calls, auth events, credits, connected users and tasks all price the same workload differently, sometimes by a factor of ten. Run the maths at launch volume and at ten times launch volume before signing anything annual.
Finally, test the failure paths, not the demo path. Revoke a token, expire a credential, hit a rate limit, and watch what your users see. Integration platforms earn their money in those moments, and they are where the products genuinely differ.
Frequently asked questions
What does Composio do that these tools replace?
Composio gives AI agents authenticated access to more than 1,500 apps, managing OAuth, API keys and token refresh per user and exposing actions through SDKs and MCP. Each alternative here covers that core job with a different emphasis: governance, catalog size, code control, unified data or embedding.
Which alternative has the biggest app catalog?
Pipedream Connect, at more than 3,000 APIs and 10,000 tools, ahead of Composio's own 1,500 plus apps and Zapier's app universe. Catalog counts are vendor claims and count different things, so check your specific apps by name.
Which is best for a SaaS product's built in agent?
Paragon ActionKit and Nango are built for product embedding, with connected user models designed for your customers' accounts. Arcade and Merge suit products where governance and audit are the selling points.
Is there a free alternative?
Yes. Arcade, Pipedream Connect, Nango and Merge all publish free tiers, Zapier has a free plan, and n8n is free to self host. Free tiers meter usage tightly; they are for building and proving, not for production volume.
How much do these platforms cost at scale?
More than the headline. Self serve entries run from free to about 100 dollars a month, but usage meters (calls, credits, connected users) decide the production bill, and enterprise governed options like Merge start at 1,000 dollars a month. Model your call volume before choosing.
Sources we checked (0)
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.