OpenAI API alternatives
What OpenAI API customers also use, ranked by public customers.
None of the 5 OpenAI API customers on usedby is listed with another tool on this list yet.Latest check Oct 8, 2026: 265 of 320 public lines checked. Customer counts include every proof level, job-post signals included. Shared customers are counted on confirmed or observed lines on both tools.
No OpenAI API customer on usedby is named with another tool of its category yet.
No company is listed with both OpenAI API and one of these tools yet.
Ranked by shared customers
Tools of the same or a competing category, from another vendor, used by at least one company that also uses OpenAI API. A shared customer has a confirmed or observed line on both tools.
Other Foundation Models (LLMs) tools on usedby
Same category, with public customers, but no company named with OpenAI API yet.
Claude73 customers
Coveo44 customers
Listen40 customers
Mistral37 customers
AlphaSense27 customers
Perplexity26 customers
Cohere23 customers
Algolia21 customers
Hebbia14 customers
You.com10 customers
Switch signals
A company that left one vendor's page and appeared on another's.
By industry
Which of these tools the companies on usedby use, by industry. Each row counts the companies of that industry on usedby that use at least one of these tools.
| Industry | Most used | Next | Companies |
|---|---|---|---|
| IT Services & System Integration | Cohere60% | Claude20% | 15 companies |
| Fintech & Payments | Perplexity38% | Claude31% | 13 companies |
| DevTools & Infrastructure | Claude50% | Cohere25% | 12 companies |
| Artificial Intelligence | Claude45% | Perplexity27% | 11 companies |
| Investment & VC | Hebbia36% | Perplexity36% | 11 companies |
Read the first row as: among the 15 IT Services & System Integration companies on usedby that use one of these tools, 60% use Cohere. Shares can add up to more than 100% because some companies use two tools.
Questions about OpenAI API alternatives
Which tool shares the most customers with OpenAI API?
usedby has not found a company named with both OpenAI API and another tool of its category yet.
Do OpenAI API customers use other tools too?
None of the 5 OpenAI API customers on usedby is listed with another tool on this list yet.
Which of OpenAI API and its alternatives do IT Services & System Integration companies on usedby use?
Among the 15 IT Services & System Integration companies on usedby that use one of these tools, 60% use Cohere. Claude comes next, with 20%.
Which of OpenAI API and its alternatives do Fintech & Payments companies on usedby use?
Among the 13 Fintech & Payments companies on usedby that use one of these tools, 38% use Perplexity. Claude comes next, with 31%.
How does usedby rank OpenAI API alternatives?
Only tools of the same or a competing category, from another vendor, count. They are ranked by shared customers: companies with a confirmed or observed line on both tools, from public pages, most with a dated capture. Tools with no shared customer are listed apart. Customer counts include every proof level, job-post signals included.