3 AI agent integration platforms to consider in 2026

As you look to integrate your agents with 3rd-party applications, you’ll come across a variety of vendors with similar features and functionality.

To help you sift through the noise and evaluate the best solutions for your agents, we’ve provided a condensed list of the best AI agent integration platforms currently available, along with their pros and cons.

Merge

Merge enables you to integrate your agents to 3rd-party apps via API endpoints and MCP servers' tools through two products: Merge Agent Handler and Merge Unified.

Top features:

• Extensive integration coverage: You can connect your agents to hundreds of API providers through a single, unified API; and you can access dozens of pre-built MCP connectors and add your own within seconds

• Integration observability: Access fully-searchable logs, automated alerts, audit trails, and more to easily troubleshoot and resolve integration issues

• Onboarding via Merge Link: Merge’s UI component lets end-users quickly set up a connection through personalized, guided steps

Pros:

• Offers both MCP and API connectivity: APIs and MCP servers have their respective advantages and disadvantages for supporting agentic use cases. With Merge, you don't have to choose; combine both to leverage each of their strengths

• Proven success: Leading AI companies trust Merge to support their agents. And there are several case studies (from Telnyx to Ema to Basis) that highlight Merge’s success in powering integrations for AI agents

• Enterprise-grade support: Merge not only offers robust security and observability features and functionality but also employs a post-sales team to help you take your integrations to market successfully and manage them with ease

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Composio

Composio offers an integration platform for AI agents that lets you connect to a wide range of MCP tools across apps.

Top Features of Composio

• Python and TypeScript SDKs: These SDKs make it easier for your engineering teams to programmatically connect your agents to Composio's platform without having to build everything from scratch or work directly with APIs
  

• Framework adapters: They support popular agent frameworks like LangChain, CrewAI, and Groq, to help you adopt integrations, faster
  

• Security features: Access audit logs and role-based access control to enforce fine-grained permissions across your agents and address potential security risks quickly

Pros: 

• Flexible pricing tiers: Composio’s pricing plans can help you get started at the right level (e.g., on their “Totally Free” plan) and move up as you scale your agents’ integrations and/or your integration requirements evolve
  

• Modern platform: Since they were founded in July, 2023, they’re built with current AI agent architecture and tooling standards in mind
  

• Well funded: They recently raised a $29M series A, which should assuage any concerns about their short to medium-term viability

Cons:

• Limited security on lower tiers: Their audit logs and role-based access control are only available on more expensive plans, which can be a barrier for security-conscious teams on tighter budgets

• Complex pricing structure: They charge based on three different metrics (Tool Calls, Premium Tool Calls, and Connected Accounts), making costs harder to predict

• Minimal observability: With only vague mentions of observability features on their site, we can assume that they offer limited observability capabilities for tool calls‍

• No tooling for testing: They lack built-in tools to test and optimize tool calls before deploying agents to production

Related: The top alternatives to Composio

Arcade

Arcade, or Arcade.dev, is an AI tool-calling platform that positions itself as an open-source marketplace with community-managed connectors.

Top features of Arcade

• Connector library: They offer connectors across software categories to support a wide range of agentic use cases
  

• Agentic tools marketplace: Open-source and for-profit community of connectors to help you find and use connectors that extend beyond what Arcade offers out of the box
  

• Flexible hosting options: They offer cloud, on-premises, and managed VPC deployment options

Pros:

• Large connector selection: 100+ pre-built connectors available, from Slack to Gmail to Dropbox
  

• Accessible pricing: You can get started for free and only move to higher tiered plans once you’ve validated the integrations and see strong adoption rates
  

• Developer-centric approach: Arcade offers a code-heavy experience for technical teams who prefer programmatic control

Related: The top alternatives to Arcade.dev

Cons:

• Unproven in the market: They don’t have any public case studies, which raises questions about their production readiness and reliability

• Limited security capabilities: They offer minimal documentation on security features like rules, logging, and auditing. This hints that they don't offer critical security capabilities for suppoprting agentic integrations

• Confusing pricing model: They charge based on multiple vague variables, including "user challenges," "standard tool executions," and "pro tool executions." This makes it harder to predict costs

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