OpenAI vs Weaviate
Which Developer Tools AI tool is better in 2026?
OpenAI
Creator of ChatGPT, GPT-4, and the leading frontier AI lab.
Weaviate
Open-source AI-native vector database
Side-by-side
OpenAI is the more established option (raised $193.3B), but Weaviate is cheaper to start.
| Metric | OpenAI | Weaviate |
|---|---|---|
| Taglinei | Creator of ChatGPT, GPT-4, and the leading frontier AI lab. | Open-source AI-native vector database |
| Foundedi | 2015🏆 | 2019 |
| HQi | San Francisco, US | Amsterdam, NL |
| Employeesi | 1001-5000 | 200-500🏆 |
| Neuron scorei | 99🏆 | 50 |
| Total fundingi | $193.3B🏆 | $50M |
| Latest roundi | Series E · Mar 2026 | Series C · Oct 2025 |
| Valuationi | $852B🏆 | $200M |
| Cheapest paid plani | ChatGPT Plus · $20/mo | —🏆 |
| Free plani | ✓ Free | ✓ Open Source |
| Free triali | ✗ | ✓ |
| Top tier pricei | ChatGPT Team · $25/mo | Weaviate Cloud · Contact sales |
| Pricing summaryi | 4 published plans | 2 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for OpenAI and Weaviate.
| Capability | OpenAI | Weaviate |
|---|---|---|
| MCP support | ✓ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✓ | ✗ |
| OAuth 2.0 | ✓ | ✗ |
| SDK languages | 6 (Python, Node.js, TypeScript, Go…) | 5 (Python, Go, TypeScript, JavaScript…) |
| Free plan | ✓ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✓ |
| Active deal | ✓ | ✗ |
🟢 Strengths of OpenAI
- Has raised more capital ($193.3B vs $50M)
- Higher Neuron score (99 vs 50)
- More mature (2015)
🔵 Strengths of Weaviate
- Offers a free trial
- Newer company (2019)
- Verified profile
Which should you choose?
Choose Weaviate if price matters most — it starts at Open source, which is friendlier for teams watching burn. Both AI Developer Tools tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose OpenAI if you want the most established option — it has raised $193.3B, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
💸 Deals
Free daily tokens via OpenAI data-sharing tier
Eligible OpenAI API tiers can earn free daily tokens on GPT-4.1, GPT-4o, and other models by opting in to share prompts and completions for model improvement.
Terms: Opt-in required. Token allotment varies by tier.
Frequently asked questions
OpenAI vs Weaviate — which is better?
It depends on your priority. OpenAI has raised more capital and is the more established option; Weaviate is cheaper to start. See the side-by-side table above.
Is OpenAI cheaper than Weaviate?
No — Weaviate's cheapest paid plan is Free, while OpenAI's is ChatGPT Plus · $20/mo.
Do OpenAI and Weaviate offer free plans?
OpenAI: Yes, has a free plan. Weaviate: Yes, has a free plan.
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