01
n8n
vs Stack AIFree to self-host and cheapest at scale; billed per full run, not per credit.
€20/mo Visit →
alternatives
Stack AI alternatives (2026)
The cheapest alternative to Stack AI is OpenAI AgentKit (Free to build; usage ~$0.20/1M input tokens (GPT-5.4-nano)). If you want to self-host, n8n can run on your own infrastructure. Below: the strongest alternatives, ranked, with the real reason to switch.
closest cheaper pickOpenAI AgentKitFree to build; usage ~$0.20/1M input tokens (GPT-5.4-nano)
self-host pickn8n€20/mo
total compared8managed and self-host options
Pricing decoded and verified 2026-06-01 against each vendor's live page; volatile figures flagged "verify live".
what you're leaving
Stack AI is stack AI is a no-code, drag-and-drop platform for building enterprise AI agents and workflows that connect LLMs to internal data sources, documents, and apps. It leans hard on governance: on-prem/VPC deployment, SSO, access control, and SOC 2, HIPAA, and GDPR compliance. It targets regulated teams (finance, healthcare, legal) that need agents without writing code. The drawback: The live pricing page now shows only Free and Enterprise: there is no published paid mid-tier, so any real usage means a custom sales quote with no transparent price. On-prem/VPC, SSO, and compliance are all Enterprise-only.
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Ranked alternatives
Ordered by how cleanly they replace Stack AI.
02
MindStudio
vs Stack AIA flat $20/mo platform fee with unlimited runs (AI tokens metered separately) makes budgeting more predictable than Stack AI's per-credit burn.
$20/mo Visit →
03
Relevance AI
vs Stack AIBuilt around multi-agent "teams" with a transparent dual meter.
$29/mo Visit →
04
Gumloop
vs Stack AIBiggest free tier (5,000 credits/mo) and strong for data-heavy flows.
$37/mo Visit →
05
Lindy
vs Stack AIThe most hands-off "AI employee" with voice/phone, if you want done-for-you.
$49.99/mo Visit →
06
Botpress
vs Stack AIBotpress is a no-code AI agent and chatbot builder pairing a visual Studio with a code-first developer kit (ADK). It deploys agents to channels like WhatsApp, Messenger, Slack and web chat, and bundles the underlying LLM cost into a per-conversation price with no markup. Pricing is per conversation, billed in monthly packs once you exceed your plan allowance.
~$150 (billed annually)/mo Visit →
07
Voiceflow
vs Stack AIVoiceflow is a no-code/low-code platform for designing, building, and deploying AI chat and voice agents on a visual canvas. It targets agencies and businesses that want to ship customer-facing assistants across web, voice, and messaging channels without writing code, while keeping control over LLM choice, knowledge bases, and tools. Pricing moved to a unified credit model (April 2025) where a monthly plan fee includes a credit allowance and usage is metered against it.
~$60 (Pro); Free tier available/mo Visit →
08
OpenAI AgentKit
vs Stack AIOpenAI's visual, drag-and-drop toolkit for building, deploying, and optimizing AI agents without standing up your own orchestration layer. It bundles Agent Builder (a node-based canvas for multi-agent workflows with guardrails), ChatKit (embeddable chat UI), Connector Registry (managed data connectors), and Evals. There is no separate product fee: you build for free and pay only standard OpenAI API usage when your agents actually run.
Free to build; usage ~$0.20/1M input tokens (GPT-5.4-nano)/mo Visit →
Stack AI vs the alternatives
The baseline against every option, decoded.
| tool | entry price | pricing model | free tier | self-host | mcp |
|---|---|---|---|---|---|
| Stack AI baseline | Free, then Custom (contact sales)verify live | Free tier plus custom enterprise quote (per-seat and usage based) | Yes: Free plan with 500 runs/month, 2 projects, 1 seat, and community (Discord) support. | Yes | None |
| n8n | €20/mo | per-execution | self-host free | Yes | Both |
| MindStudio | $20/mo | flat + usage | 1,000 runs/mo (free plan) | Yes | Both |
| Relevance AI | $29/mo | dual-meter | 200 actions/mo | No | Both |
| Gumloop | $37/mo | per-credit | 5,000 credits/mo | No | Both |
| Lindy | $49.99/mo | per-credit | 400 credits/mo | No | Both |
| Botpress | ~$150/mo (billed annually) | per-conversation (LLM/AI usage included, no markup) | Free plan: 100 conversations/mo, 1 seat, 3 agents | No | Both |
| Voiceflow | ~$60/mo (Pro); Free tier available | Monthly subscription (per workspace) with an included credit allowance plus usage-based credits and per-editor seat add-ons. | Yes. Free Starter plan: $0/mo with ~100 credits/month, 1 editor seat, limited agents (around 2). Good for evaluation, not production volume. | No | Client |
| OpenAI AgentKit | Free to build; usage ~$0.20/1M input tokens (GPT-5.4-nano) | Usage-based (pay-per-API-token plus built-in tool fees); no platform subscription. Agent Builder design time is free; you pay standard OpenAI API rates only when workflows run. | Agent Builder canvas, preview runs, and versioning are free to use. ChatKit and File Search include 1 GB free storage per account per month; first 1 GB of File Search storage is free. You pay only for the model tokens and tool calls your agents consume at runtime. | No | Client |
Dirr is independent and not affiliated with, endorsed by, or sponsored by Stack AI. Tool names and logos are the property of their respective owners. Figures are decoded from public pricing and dated; verify volatile prices on the vendor site before buying.
Questions
What is the best alternative to Stack AI?
The cheapest alternative to Stack AI is OpenAI AgentKit (Free to build; usage ~$0.20/1M input tokens (GPT-5.4-nano)). For self-hosting, n8n can run on your own infrastructure. The right pick depends on whether you optimize for price, control, or hands-off automation.
Is there a free alternative to Stack AI?
Yes. n8n is free if self-hosted, and Gumloop's free tier gives 5,000 credits/mo. Most listed tools have a free plan to test before paying.
Why switch from Stack AI?
Common reasons: The live pricing page now shows only Free and Enterprise: there is no published paid mid-tier, so any real usage means a custom sales quote with no transparent price. On-prem/VPC, SSO, and compliance are all Enterprise-only.