HaystackOpen-source framework and enterprise platform for AI agents and RAG applications.
vs
Stack AIAI Agents for the Enterprise
Comparison · AI Agents · weekly run Nov 3
Haystack vs Stack AI
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Stack AI is the stronger AI pick in AI Agents: it has a visibility score of 1.4 versus 0 for Haystack.
Choose Haystack if…
- You need a self-hosted or on-premises option
- You need SOC 2 Type 2 (vendor claim, not an independent report) coverage
Choose Stack AI if…
- You want the brand AI engines rank higher (1.4 vs 0)
- You need HIPAA or GDPR or SOC 2 Type II or ISO 27001 coverage
- hosted no-code agent builders
- free tiers for experimenting
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Haystack | Stack AI |
|---|---|---|
| Visibility score | 0% | 1.4% |
| Change vs last week | New | New |
| Rank in AI Agents | #76 | #51 |
| Share of voice | 0% | 0.4% |
| Mentions this run | 0 | 3 |
| Positive in AI answers | — | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Haystack 0pp · Stack AI 0pp over 0 weekly runs.
Engine by engine
Stack AI leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
HaystackStack AI
Head to head in AI answers
0 engine answers name both brands
0Haystack ranked higher
0Stack AI ranked higher
Features, pricing & fit
| Dimension | Haystack | Stack AI |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Contact sales |
| Free plan | — | Yes |
| Deployment | Managed cloud, self-hosted, and sovereign or air-gapped environments, including STACKIT for sovereign European cloud | Multi-tenant cloud, VPC, or on-premise |
| Integrations | — | 500+ |
| Compliance | SOC 2 Type 2 (vendor claim, not an independent report) | HIPAA, GDPR, SOC 2 Type II, ISO 27001 |
| Support | — | Community support on Discord, Email support, Priority support, Dedicated support |
| Founded | 2018 | 2023 |
| Headquarters | Berlin, Germany | San Francisco, CA, United States |
| Employees | 51–200 | 51–200 |
| Funding | Round led by Balderton Capital, with GV, Harpoon, System.One and Lunar participating · $46M raised | Series A · $19M raised |
| Best for | Teams building AI agents and RAG applications with Python | IT teams and enterprise architecture teams that need to orchestrate, deploy, govern, and scale AI across the enterprise, including finance, risk and operations teams. |
Plans side by side
Haystack
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Haystack
Profile in progress.
Stack AI
- hosted no-code agent builders
- free tiers for experimenting
- solid G2 and Slashdot ratings
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Haystack vs Stack AI”, https://slateindex.ai/compare/haystack-vs-stack-ai, data of Nov 3, 2026. Licence: CC BY 4.0.