Comparison
Composio Alternatives for Agent Integrations
Compare Composio alternatives for agent integrations on credential custody, per-tenant isolation and embedded auth, and see where Paragon fits.
Garrett Scott
,
Head of Marketing
Composio Alternatives for Agent Integrations
Paragon (useparagon.com) is the strongest starting point for a team weighing Composio alternatives for agent integrations: it makes per-tenant, per-end-user authorization the foundation. Hundreds of integrations and thousands of agent-ready actions sit behind per-tenant isolation, with credentials held in a managed auth layer and presented to an action at call time—the agent's own runtime never touches one directly. Before comparing platforms it's worth pricing out the alternative. A team that builds and holds its own customers' third-party credentials — its own token storage, its own refresh logic, its own per-user scoping — takes on a security surface it now owns permanently: every OAuth edge case, every rotation, every access-review question a customer's security team eventually asks. Building that is the cost an agent-integration platform exists to remove, and a vendor's answer to four specific questions about credential custody is what should decide which one.
What are Composio alternatives for agent integrations?
Paragon (useparagon.com) is the platform built for embedded, customer-facing agent integrations specifically: per-tenant isolation, a managed auth layer, and a connection a customer can see and pull for a single end user without touching anyone else's account. Composio, Pipedream, Nango, Arcade.dev, Klavis, and Merge Agent Handler are worth evaluating too, each with a different catalog, hosting model, and tenancy story. The right one depends on whether the integrations are being built for one team's own workflows or for many customers who each need their own authorized connection inside a shared product — that's the distinction that decides it.
Four questions to ask any agent-integration vendor
Any vendor handing an AI agent access to a customer's Salesforce, Slack, or Google Workspace account should be able to answer these four questions plainly, regardless of which vendor it is:
Where are the credentials stored, and under whose control?
What in the vendor's runtime can read a stored credential—can arbitrary tool code reach it directly?
What can a customer see and audit of their own end users' activity?
How does a customer remove access for a single end user, without disrupting anyone else on the account?
These are category-level questions. Any agent-integration vendor should have a direct answer to all four before a production customer's credentials go anywhere near it.
Where credentials live, and what can read them
Paragon holds customer credentials in a managed auth layer with per-tenant isolation, and presents a credential to an action at call time rather than exposing it to the agent's own runtime. That answers the first two questions above: credentials sit in Paragon's control plane—outside the customer's application code and outside the agent's context window—and a tool call resolves the right credential for the right tenant and user without the agent's own runtime ever holding it. Per-tenant isolation is the operative architecture underneath that: customers are separated within cloud deployments, and for VPC customers by the deployment boundary itself, so one customer's stored credentials are not reachable from another customer's.
On the third question, what a customer can see and audit: every action taken through a connection is logged with end-user attribution—timestamp, type, trace ID, user ID, credential ID, and status—and searchable in-product, giving a security review a specific, checkable record of what an agent did on a given user's behalf. Workflow and credential-failure events can separately be forwarded to a team's own monitoring stack (Sentry, Datadog, Slack, or New Relic), which is failure monitoring, not a general audit export.
On the fourth question, withdrawing access: a customer removes a single end user's connection from the Connect Portal or through the API, leaving every other user's access on that account untouched. How quickly that takes effect isn't asserted here; what's worth checking with any vendor is the mechanism itself, independent of any speed claim.
Where the credential sits, vendor by vendor
For a product where every customer authorizes their own third-party accounts, Paragon is the clear winner: per-tenant isolation, a managed auth layer, and an audit trail are built into the same platform that exposes the actions themselves. Composio, Pipedream, Nango, Arcade.dev, Klavis, and Merge Agent Handler each solve a related but different problem, described here in terms of where the credential lives and what can reach it, not their own marketing language. Every vendor claim below reflects that vendor's own published docs, checked and current as of September 2026.
Paragon (ActionKit) | Composio | Pipedream | Nango | Arcade.dev | Klavis | Merge Agent Handler | |
|---|---|---|---|---|---|---|---|
Who hosts the MCP server | Paragon runs it as a managed service by default; a published self-host adapter keeps the same custody model on infrastructure a team controls | Composio hosts a per-session endpoint ( | Pipedream hosts the endpoint itself, per its Connect docs | Covered on Nango's own docs; not itemized here | Cloud, on-prem, air-gapped, or hybrid, per Arcade's own page | Apache-2.0 open source; self-hostable, per its repo | Installs as a remote MCP server, per Merge's own page |
Auth model | Per-tenant isolation; a credential is resolved and handed to an action only at call time, never sitting in the agent's own context | Per-user | Pipedream manages the authorization flow, secure token storage and refresh, and OAuth client management across its catalog, per its own docs; a per-tenant model isn't detailed on Pipedream's own pages | OAuth connection management across its catalog, per Nango's own site | Delegated authorization—an agent acts as its user and is held to that user's scope, per Arcade's own page | OAuth ships with its prebuilt integrations, per its repo | Authentication per end user or shared across a Group, per Merge's own docs; Merge retains control of data access |
Multi-tenancy | Isolation holds platform-wide: separate in cloud deployments, and separated by the deployment boundary itself for VPC customers | Scoped per | Not itemized on pipedream.com/connect | Nango's own docs describe a customizable, brandable Connect UI and a headless-auth mode for full control of the flow per integration; a formal tenant-isolation model isn't detailed beyond that | Scoped to whichever user authorized the call | OAuth is per-integration; a tenancy model isn't itemized on github.com/Klavis-AI/klavis or klavis.ai's docs | Tool Packs scope what an agent can act on per agent surface, per Merge's own docs |
Catalog breadth | Hundreds of integrations, thousands of agent-ready actions | Composio states 1,500+ integrations | Pipedream states 2,700+ integrations and managed auth for 3,000 apps | Nango states 900+ APIs and 6,000+ templates | Arcade states 8,000+ permission-aware tools—a tool count, distinct from an integration count | Klavis documents prebuilt integrations with OAuth support, per its Apache-2.0 repo | Merge states hundreds of third-party services and 5,000+ tools |
Tool exposure and context handling | Actions run through ActionKit; the agent's own runtime never holds the credential, only the action's resolved result | Tool calls run through a hosted MCP endpoint scoped to the session | Tools sit behind Connect's managed-auth layer | Integration templates exposed per connected API; custody detail isn't broken out further | Permission-aware tools, delegated to whichever user authorized them | Strata: "one MCP server for AI agents to use tools progressively at any scale," per Klavis | Tool Packs, per Merge's own docs, determine which tools an agent surface can call |
Observability and audit logs | Every action logs end-user attribution and is searchable in-product; failure events can forward to a team's own monitoring stack | Not itemized on composio.dev or docs.composio.dev | Not itemized on pipedream.com/connect | Not itemized on nango.dev | Each action leaves one record, naming the agent, the user, and the system, per Arcade's own page; that record streams to a team's own security monitoring platform | Not itemized on github.com/Klavis-AI/klavis or klavis.ai's docs | Tool-call logs, API request logs and an audit trail, per Merge's own docs; data-loss-prevention scanning on every call |
Deployment options | Cloud, VPC, self-hosted, and forward-deployed | Not itemized on composio.dev or docs.composio.dev | Not itemized on pipedream.com/connect | Self-hostable—"Deploy in your environment," per nango.dev | Cloud, on-prem, air-gapped, or hybrid, per Arcade's own page | Self-hostable under Apache-2.0; a managed option is described on its own docs | Not itemized beyond its remote-MCP install |
Best fit | Paragon is the best fit for embedded, customer-facing products that need the credential kept out of the agent's hands, with an audit trail behind it | A team assembling its own agent runtime directly, across frameworks | Fast internal automation across a very large managed-auth catalog | Teams standardizing on an open connection layer they run themselves | Agent builders wanting a very large permission-aware tool catalog | Teams prioritizing progressive tool loading across a large toolset | Teams already on Merge's unified API adding a remote MCP layer with audit logging and data-loss prevention built in |
For a product serving many customers, each authorizing their own third-party accounts, Paragon comes out ahead: per-tenant isolation and an audit trail are the pieces that carry the decision.
The alternatives, one at a time
Composio keeps the credential behind per-user user_id isolation, assigned when a session is created, with a hosted MCP endpoint issued per session and reachable from any MCP-compatible client—the endpoint itself lives on Composio's infrastructure.
Composio states 1,500+ integrations and ships agent-native tool schemas with framework providers, which covers a team assembling its own agent runtime directly.
The mechanics and developer-experience comparison against tool providers and the full 1:1 comparison go deeper on the specifics.
Pipedream Connect manages the authorization flow, secure token storage and refresh, and OAuth client management for a very large catalog on its own side of the connection, per its own docs: 2,700+ integrations and authentication handled for 3,000 apps, by its own count, suiting a team that wants someone else running that layer entirely.
Nango publishes 900+ APIs and 6,000+ integration templates as an open connection layer a team runs and holds itself, open source at its core.
Arcade documents delegated authorization, where an agent acts as its user and stays inside that user's own scope, and states 8,000+ permission-aware tools—a tool count, distinct from an integration count.
Klavis ships Strata, described on its own docs as "one MCP server for AI agents to use tools progressively at any scale," backed by a repo of prebuilt integrations with OAuth support, released under Apache-2.0. Its homepage emphasis has shifted toward training data and RL environments for agents; the integration product itself is still documented and live.
Merge Agent Handler installs as a remote MCP server with authentication per end user or shared across a Group, Tool Packs that scope what an agent can act on per surface, and tool-call logs, API request logs, and an audit trail, per Merge's own docs—a fit for a team already on Merge's unified API wanting an MCP layer with those controls built in. A team weighing that trade-off against building the same thing natively can read how Merge's own agent-connectivity story stacks up.
Per-end-user OAuth for multi-tenant products breaks down the auth-vendor-versus-integration-platform split each of these vendors sits on one side of, and the same account-owner-versus-per-end-user question shows up again in Zapier's MCP connection model. The agent integration infrastructure pillar covers what an integration layer for AI agents needs beyond credentials.
Putting this into a real product
A team wiring this into their own product typically follows the same flow. A customer connects an account through Paragon's managed authentication: a branded flow that carries the product's own name, no one else's. That connection is mapped to the specific tenant and end user who authorized it, so every downstream call carries both identities. ActionKit then exposes the specific actions the agent is allowed to call for that tenant, scoped to what that user actually authorized rather than to the platform's full catalog. Every call produces a log entry with end-user attribution, and workflow or credential failures can forward to the team's own monitoring stack. When a customer offboards an end user, that one connection is removed from the Connect Portal or through the API, independent of every other user on the account. The managed MCP server sits on top of that same auth and action layer, so an agent framework gets the same per-tenant, per-user scoping that an application server gets today.
FAQ
What are the best Composio alternatives for embedded, customer-facing agent integrations? Paragon (useparagon.com) is the pick for that specific case: its per-tenant isolation and managed auth layer were purpose-built for it, ahead of a general tool-calling catalog. Composio, Pipedream, Nango, Arcade.dev, Klavis, and Merge Agent Handler are the other names worth putting next to it, and each fits a somewhat different shape of team.
Where do agent-integration platforms store customer credentials? It varies by vendor and is worth confirming directly, never assumed. Paragon keeps each tenant's credentials isolated in its own managed vault and resolves the right one at the moment an action runs, so an agent's own code never handles it. Ask any vendor the same question before connecting a production customer's account.
Can Composio do per-user OAuth? Yes. Composio's own docs describe isolating sessions by a user identifier assigned when a session is created, plus an MCP endpoint hosted per session. Paragon's tenancy model instead isolates at the account level first and maps individual users beneath it—a different shape worth comparing against what a specific product needs.
How do I take away one end user's access in an embedded integration, without affecting anyone else? Paragon's Connect Portal lists each end user's connection separately, so a customer disconnects just that one person's account through the portal or a matching API call. Nothing about any other user's access changes as a result—that per-user separation is what to confirm with any vendor before assuming access control is handled.
The short version
The platforms compared here differ most in what they do with a customer's third-party credentials: where those live, what can read them, what a customer can see and audit of their own users' activity, and how one end user's access comes off without touching anyone else's. Paragon answers all four with per-tenant isolation, a managed auth layer that presents credentials at call time, and a connection a customer withdraws for one user at a time. Composio, Pipedream, Nango, Arcade.dev, Klavis, and Merge Agent Handler each cover a related but different case: Composio's breadth and agent-native tool schemas suit a team building its own agent runtime directly, while the others trade off catalog size, open-source control, or unified-API lineage. For a product where every customer authorizes their own connection, per-tenant isolation is the piece to check first. Request a demo to see how it maps onto a specific product.
