Composio vs E2B (2026): which should you pick?

Pick Composio if

• Fits if you build agents and want one layer for app connections and OAuth
• Works for a small team trying tool calls on a free plan

Look elsewhere if

• Watch out: the pricing page covers two products, per seat for For You and per workspace for the platform
• Tight if you are on For You Free, where Firewall, SSO and zero data retention are not included
• Pricey if you go over: $0.005 a tool call on For You, $0.0003 on Pro
• Watch out: Platform Hobby stops at its limits, and managed apps are capped at 20,000 calls there

Pick E2B if

• Fits if you build agents that run code and need an isolated place to run it
• Works for a developer who wants a $100 credit before paying

Look elsewhere if

• Pricey if you move to Pro: $150 a month before any sandbox usage
• Watch out: a default 2 vCPU sandbox is billed at $0.000028 a second and memory separately
• Tight if you scale: 600 or 1,100 concurrent sandboxes add $500 or $1,000 a month
• Not for you if you need a free allowance that renews, as the $100 credit does not
• Skip it if you want a no-code product, as it is used through SDK and API

Composio

• The pricing page covers two products; the For You plans are priced per seat and the platform plans per workspace, so check which one fits.
• On the free For You plan, Firewall, SSO and zero data retention are not included; they start at Standard.
• Extra tool calls cost $0.005 each on For You, and $0.0003 each on the platform's Pro plan after the included amount, paid from credits.
• Platform Hobby stops at its included limits rather than billing overages, and Composio-managed apps are capped at 20,000 calls there.

E2B

• Usage is billed separately from the plan: for example a default 2 vCPU sandbox costs $0.000028 per second and 4 GiB of memory $0.000018 per second.
• The free Hobby tier is a one-time $100 credit, not a renewing allowance, and caps sessions at 1 hour and 10 concurrent sandboxes.
• Going from 100 to 600 or 1,100 concurrent sandboxes adds $500 or $1,000 a month on top of Pro.
• It is infrastructure for developers: there is a web console but the product is used through the SDK and API.

Composio

1,700+ app toolkits

The catalog covers apps such as Gmail, Slack, Notion, Salesforce, HubSpot, GitHub and Linear, with authentication handled by Composio.

Managed OAuth

Consent, token storage, refresh and scopes are handled for every connected account, with the option to pass your own tokens instead.

Triggers

Events from connected apps are delivered to a webhook, so an agent can start from something that happened in another app.

MCP gateway and custom servers

One managed MCP endpoint exposes the connected tools, and servers from other providers or your own team can be added beside them.

Firewall

Plain-English policies check tool requests and results, and the vendor says it blocks instructions hidden in tool output and catches secrets.

Instant tools

Audio, video, image, search and enrichment tools run on Composio's own provider accounts, billed from credits rather than separate sign-ups.

E2B

Isolated sandbox per session

Each agent session gets its own microVM with a shell, filesystem, network and an optional browser or desktop.

Snapshots and pause

Sandboxes start from a snapshot, and a sandbox can be paused and resumed from the same state.

Python and JavaScript SDKs

The sandbox is created and controlled from code with the e2b package for Python or npm.

Bring your own cloud

The same SDK works on E2B Cloud in the US, EU and APAC or inside your own AWS, GCP or Azure account.

MCP tools inside the sandbox

The site says more than 200 MCP servers can be called from inside a sandbox, and secrets are scoped per sandbox.

Per-second usage billing

Running sandboxes are charged by the second for vCPUs and memory, so cost follows run time and size.

Composio

• For You: Free$0

  Up to 3 members, 10,000 tool calls a month, 3 custom MCP servers, 5 shared connections and $2 in one-time credits for Instant tools.

• For You: Standard$18

  per seat / month

  Whole team, 10,000 tool calls and $18 in credits per seat each month, plus Firewall, SSO and zero data retention.

• Platform: Hobby$0

  SDK access with 100,000 tool calls and 50,000 trigger events a month, 3 team members and unlimited connected accounts.

• Platform: Pro$29

  per month

  Hobby plus $29 in monthly credits, unlimited team members, higher API rate limits and paid add-ons. Past the free amounts, usage is billed from credits.

• EnterpriseCustom

  Committed volume, SSO and SCIM, bring-your-own-cloud, audit logs, dedicated support and custom terms, on either product.

E2B

• Hobby$0

  One-time $100 usage credit, sessions up to 1 hour, 10 concurrent sandboxes and the default sandbox CPU and RAM. Usage is charged against the credit.

• Pro$150

  per month, plus usage billed by the second

  Sessions up to 24 hours, 100 concurrent sandboxes (expandable to 1,100 with add-ons at +$500 and +$1,000 a month) and custom sandbox CPU and RAM.

• EnterpriseCustom

  Committed usage, custom billing, multi-day sessions, bring-your-own-cloud. The page says it starts at a $2,000 monthly commit.

Composio

No public discounts listed.

E2B

• Startups

  $20,000 in credits and Pro for early-stage startups

  A one-time $20,000 in credits plus the Pro tier for startups under three years old that have raised less than $5M.