Top 9 of 38 alternatives

StackAI alternatives, led by ElevenLabs Agents (free plan)

The closest alternatives to StackAI in October 2026 are ElevenLabs Agents, Blits.ai Agentic AI for the Enterprise and Gumloop.

Updated 18 October 2026

9 agents compared · 6 with a free plan · prices checked 2 September–1 November 2026

Reviewed by The Agents Index editorial team.

Is StackAI yours? Claim it free.

Featured agents appear first in this shortlist and on their category page.Get featured

StackAI and its alternatives at a glance

Agent	Best for	Starts at	Better than StackAI at	Checked
StackAI		Free source		9 September 2026
ElevenLabs Agents	Developers and product teams who want ElevenLabs' voice quality and cloning as the foundation of their agent, and are comfortable assembling the rest of the stack themselves.	Free, then $6 a month source	On the command line, In your pipeline	18 October 2026
Blits.ai Agentic AI for the Enterprise	Enterprise operations teams automating governed workflows across business systems	On quote source	Done-for-you service, Self-hosted	31 October 2026
Dify	Developers and teams who want an open-source, self-hostable platform to build RAG apps and agents with full data control.	Free, then $59 a month source	On the command line, Self-hosted	1 November 2026
Manus	Individuals and teams who want to offload whole multi-step tasks (research, simple builds, data work) to an autonomous agent rather than prompt a chatbot turn by turn.	Free, then $20 a month source	Writes code, API access	19 September 2026
Letta	Developers and researchers who specifically need an agent whose memory, skills and identity genuinely persist and evolve across long-running sessions, rather than reset on every call.	Free, then $20 a month source	Writes code, In your editor	2 September 2026
Genspark	A consultant, marketer, founder or operations lead who wants research, files, code, slides and media handled in one web workspace.	Free, then $24.99 a month source	Writes code, Open source	26 October 2026

Closest alternatives to StackAI

The ones people open most here come first, then the closest matches. How we check

1
ElevenLabs Agents
From Free
Hosted platform for building voice and chat agents, with telephony, SDKs and a choice of LLM.
Why it's on this list
On the command line: YesA standalone CLI authenticates by OAuth and pushes, pulls and diffs agent, tool and test configurations held as files in version control.
Source ↗
Better than StackAI at
- In your pipeline: Yes ↗
- Open source: Partly ↗
Trade-offs
- In your editor: No ↗
- Admin controls: Partly ↗
Watch for
Covers the voice + LLM-orchestration layer, not a turnkey ops product, CRM/helpdesk workflows, observability and compliance UI are yours to build.
2
Blits.ai Agentic AI for the EnterpriseVerified owner
On quote
Enterprise platform for governed agentic workflows across models, tools, data and systems.
Why it's on this list
Done-for-you service: YesBlits.ai supplies both the platform and a team that builds, deploys, operates, and improves customer use cases.
Source ↗
Better than StackAI at
- Self-hosted: Yes ↗
- API access: Yes ↗
Trade-offs
- In your editor: No ↗
- On the command line: No ↗
3
Gumloop
From $37 a month
Multiplayer AI agent builder: teams build agents over their apps while IT keeps governance and spend control.
Why it's on this list
Writes code: YesAgents generate and execute Python and shell code in a per-conversation cloud sandbox that is on by default, and can ship code as a shareable artifact.
Source ↗
Better than StackAI at
- On the command line: Yes ↗
- API access: Yes ↗
Trade-offs
- Done-for-you service: No ↗
- Free tier: Partly ↗

The rest of the shortlist

Dust
Platform for building and running company agents on connected tools, data and 20+ models.
From Free
Dify
Visual platform for agentic workflows and RAG, on Dify Cloud, your VPC or self-hosted.
Watch for: The "open-source" licence carries extra conditions beyond Apache-2.0, not unrestricted for every commercial use.
From Free
Manus
General-purpose AI agent that plans and executes multi-step tasks on its own cloud computer.
Watch for: Credit consumption is hard to predict; complex jobs can be costly.
From Free
Precision AI OSVerified owner
AI implementation firm building data pipelines, a private firm OS and task agents for service firms.
Letta
Stateful agent harness, cloud and SDK for agents with persistent, git-versioned memory.
Watch for: Smaller ecosystem and community than LangChain, LlamaIndex or Microsoft AutoGen.
From Free
Genspark
All-in-one AI workspace with an autonomous Super Agent plus agents for slides, docs, media and code.
Watch for: Credit metering can make heavy agent, video, audio or multi-model runs difficult to forecast.
From Free

On this page

Compare StackAI with the shortlist
Compare alternatives to StackAI
Questions buyers ask
Sources and method

Compare StackAI with the shortlist

Compare alternatives to StackAI

Comparing against

Alternative 1

Alternative 2

Alternative 3

The digest

Which agents actually ship. New agents and articles, by email, at most once a week.

Where next?

The StackAI listing →More in Agent platforms →Submit your agent →

Questions buyers ask

What are the best alternatives to StackAI?

ElevenLabs Agents, Blits.ai Agentic AI for the Enterprise and Gumloop are the closest. They share the most of StackAI's features.

What is the cheapest alternative to StackAI?

6 of the 9 have a free plan: ElevenLabs Agents, Dust, Dify, Manus and Letta and 1 more. The lowest paid plan is Gumloop, from $37 a month. Price checked on 24 October 2026.