AI21 vs Cogni
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
AI21 compared with Cogni
| Detail | 
AI21 | C
Cogni |
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| What it does | Post-train specialized models for your task, creating an AI edge your competitors can't buy
| Memory that reasons
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| Stage | Established
| Not given
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| Founded | Not given
| Not given
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| Based in | IL
| US
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| Pricing model | Contact for pricing
| Freemium
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| Pricing | Not given
| Free plan at $0 USD; Pro plan at $5 USD per month.
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| Key features | - Forward-Deployed Researchers provide end-to-end model training and optimization
- Custom evaluation suite development from real tasks
- Production-ready deployment with cost-quality trade-offs
- Deployment flexibility including on-premises and VPC options
- Data security with no retention and full traceability
- Continuous model improvement from production traffic
- Customer ownership of model weights and training recipes
| - Entity-graph spreading activation for cross-vocabulary retrieval
- Works with any LLM model
- No LLM or GPU in retrieval path
- Point-in-time and windowed recall
- Timestamped memories
- Fixed recall cost as memory grows
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| What makes it different | - Customers own specialized models trained on proprietary data, not rented general-purpose models
- Achieve frontier-level quality at lower costs through specialized training
- Five years of experience with diverse post-training and optimization methods
- Models ship production-ready in weeks with ongoing improvement capability
- Secure deployment with no data retention and auditable access controls
| - Reaches answers across unrelated documents that share no keywords, where vector search scores zero
- Deterministic retrieval with no model in the path, so results never vary between queries
- Constant per-query cost regardless of memory size, even at 32,000 words
- No infrastructure to run—no vector database, cluster, or GPU needed
- Works with any model, so small local models gain the most from better retrieval
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| Free plan | Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 75 ● no change since last check | 4 ● no change since last check |
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| Trust Flow (Majestic) | 22 | 2 |
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| Citation Flow (Majestic) | 44 | 21 |
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| Referring domains (Majestic) | 3529 | 34 |
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5 details filled in for both companies.
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