Top 6 of 13 researched candidates
Alternatives to Google Agent Development Kit (ADK)
Find a better fit for what you need. Compare alternatives to Google Agent Development Kit (ADK) with sourced features, strengths and trade-offs side by side.
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Evidence-backed shortlist
Closest researched alternatives to Google Agent Development Kit (ADK)
Ordered by the requirements met, strengths preserved, explicit trade-offs and research coverage. Sponsorship does not enter the order.
- 01
Agno
Python SDK, self-hosted AgentOS runtime and hosted control plane for building and operating agent platforms.
From FreeWhy it's on this listWrites code · YesShips a CodingTools toolkit whose documented job is editing files and running commands in a scoped project directory.Evidence ↗
Where it improves on Google Agent Development Kit (ADK)
- +Debugs and fixes · YesBug fixing is a documented pattern: reproduce, patch, rerun the failing tests.Evidence ↗
- +Reviews code · YesCode review over a diff is one of the documented coding-agent patterns.Evidence ↗
Trade-offs against Google Agent Development Kit (ADK)
- −Ships it · PartialPublishing is deliberately outside the default loop; commits, PRs and deploys must be exposed as separately gated tools.Evidence ↗
- −In your pipeline · NoThe enumerated serving surfaces are REST, MCP in Claude/ChatGPT and chat apps; no pull-request or CI surface appears.Evidence ↗
- −Open source · PartialThe SDK and AgentOS runtime are Apache-2.0 on GitHub, while the control plane is a hosted product whose self-hosted variant is quoted per deal on Enterprise.Evidence ↗
35/35 researched criteria - 02
AgentsKit
Composable TypeScript packages for agent runtime, tools, memory, RAG and headless chat UI.
From FreeWhy it's on this listWrites code · YesA bundled coder persona implements features from written specs, and the CLI scaffolds typed agent projects from a natural-language description, so code authoring is a first-class use case.Evidence ↗
Where it improves on Google Agent Development Kit (ADK)
- +Reviews code · YesTwo review personas ship with the skills package, one reviewing diffs for bugs and security and one checking a diff against project conventions, and the registry offers an installable code-reviewer agent.Evidence ↗
Trade-offs against Google Agent Development Kit (ADK)
- −Ships it · PartialShell and filesystem tools plus a confirmation-gated deploy example mean you can wire a deployment step yourself, but the library ships no managed pipeline that takes a change to production on its own.Evidence ↗
- −Agent permissions · PartialGating is opt-in per tool: marking a tool as requiring confirmation pauses the run for approval or denial, so anything you do not gate executes unattended by default.Evidence ↗
- −Data residency · PartialJurisdiction is yours to choose because nothing is hosted by the vendor, and the router can pin selection to a region, but no residency guarantee is published.Evidence ↗
34/35 researched criteria · 1 not established - 03
LangChain
Open source agent frameworks plus LangSmith, a hosted platform to trace, evaluate, deploy and govern agents.
From FreeWhy it's on this listWrites code · YesThe vendor ships dcode, a free open-source terminal coding agent that writes and runs code from a prompt; it is a separate package from the paid LangSmith platform.Evidence ↗
Where it improves on Google Agent Development Kit (ADK)
- +Done-for-you service · PartialYou run the software yourself on every self-serve plan; only Enterprise buyers get LangChain engineers, architectural guidance and team training alongside the product.Evidence ↗
- +In your pipeline · YesThe vendor documents a GitHub Actions pipeline that runs tests and offline evals on a pull request, then promotes preview deployments to production through the control-plane API.Evidence ↗
Trade-offs against Google Agent Development Kit (ADK)
- −Self-hosted · PartialThe open source frameworks run anywhere, but self-hosting or hybrid-hosting the LangSmith platform on Kubernetes is an Enterprise-plan option; Developer and Plus are cloud-only.Evidence ↗
- −Open source · PartialThe frameworks and the dcode coding agent are MIT-licensed and free, while the LangSmith platform that carries the price, seats and governance is proprietary and hosted.Evidence ↗
- −Bring your own key · PartialYou can bring your own provider keys through the gateway on every plan, or buy inference as Gateway Credits, but Engine refuses your keys and bills its model use as compute units.Evidence ↗
34/35 researched criteria · 1 not established - 04
Pydantic AI
Open-source Python agent framework from the Pydantic team, with a typed agent loop and swappable models.
From FreeWhy it's on this listIn your pipeline · YesA pydantic-ai engine for GitHub Agentic Workflows runs your agent from a Markdown workflow file on issues, pull requests or a schedule, writing back through gh-aw safe outputs; the engine declares itself experimental to gh-aw.Evidence ↗
Where it improves on Google Agent Development Kit (ADK)
- +In a browser · YesA browser chat interface ships in the package via Agent.to_web() or clai web, though the docs position it for local development and debugging rather than production use.Evidence ↗
Trade-offs against Google Agent Development Kit (ADK)
- −Ships it · PartialThere is no deployment feature; the Coder shell tool runs unrestricted commands that outlive the run, so an agent can execute deploy commands you allow, and the docs warn to sandbox untrusted work.Evidence ↗
- −MCP server · PartialMCP is supported as a client: the MCP capability connects any MCP server's tools into your agent, and the CLI takes an mcpServers config file; the docs I read establish consumption, not your agent being queried as an MCP server.Evidence ↗
- −Data residency · PartialThe library holds nothing, so residency is yours. If you send telemetry to Logfire, you choose a US or EU region at signup; regions are strictly separated and migration between them is not available.Evidence ↗
34/35 researched criteria · 1 not established - 05
Letta
Stateful agent harness, cloud and SDK for agents with persistent, git-versioned memory.
From FreeWhy it's on this listWrites code · YesAgents edit and create files in your repository, including from GitHub issues and PRs.Evidence ↗
Where it improves on Google Agent Development Kit (ADK)
- +Debugs and fixes · YesVendor states coding agents debug failures and run test suites.Evidence ↗
- +Reviews code · YesReviews diffs on demand or on every PR via the GitHub action's prompt input.Evidence ↗
Trade-offs against Google Agent Development Kit (ADK)
- −Ships it · PartialCommits, pushes and opens pull requests; it cannot approve PRs and no deployment step is claimed.Evidence ↗
- −MCP server · NoMCP runs inbound only: Letta sessions consume stdio, HTTP and SSE MCP servers; no Letta MCP server is published.Evidence ↗
- −Audit log · NoNo administrative audit log is published; the Enterprise list stops at RBAC, SSO, quotas and dedicated support.Evidence ↗
35/35 researched criteria - 06
Mastra
Open-source TypeScript framework for building AI agents, with a hosted platform for running and observing them.
From FreeWhy it's on this listDone-for-you service · PartialYou run the software, but Mastra sells professional services (Concierge, forward-deployed engineering) and enterprise support covering planning, prototyping and workshops.Evidence ↗
Where it improves on Google Agent Development Kit (ADK)
- +In a browser · YesStudio is a hosted web UI for running agents, editing prompts, annotating traces and building datasets; it runs locally at port 4111 or deployed for the team.Evidence ↗
- +How it meters · YesPlan fee plus consumption metering: observability events, CPU hours, egress, memory tokens, retrieval storage and database rows all have per-unit overage rates. Not per seat.Evidence ↗
Trade-offs against Google Agent Development Kit (ADK)
- −Data residency · PartialSelf-hosted Enterprise keeps traces, prompts and outputs inside your own VPC; for the hosted platform the vendor publishes no region or jurisdiction.Evidence ↗
- −Getting out · PartialYou own your data and can cancel any time, but retention is capped by plan (15 days to 6 months), backups are your responsibility and downgrading may delete data over the new limit.Evidence ↗
35/35 researched criteria
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How the shortlist is calculated
Comparable first. We consider listings in the same category as Google Agent Development Kit (ADK) and alternatives previously researched for this page.
Requirements first. We prioritise your selected needs, then shared strengths, fewer documented trade-offs, more complete research and finally alphabetical order.
Unknown remains unknown. Missing evidence is never converted into a benefit or a trade-off. Every improvement shown above comes from the same sourced criterion as the listing.
Independent order. Payment does not affect selection or ranking. Paid placements are labelled Advertisement.
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