OpenAPI alternatives
As of 4 November 2026, 39 api specs data formats are named by companies instead of OpenAPI: JSON by 6,396 companies, XML by 5,264, Model Context Protocol by 4,892.
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- OpenAPI, companies in postings
- 1,432
- Most used alternative
- JSON · 6,396
- Fastest hiring, 90 days
- JSON
- Alternatives ranked
- 39
- Catalogue
- T-1.0.1-prov
api specs data formats companies choose instead of OpenAPI
Companies naming each tool in their own postings, and postings in the last 90 days. Bars are relative to the category leader.
| # | Alternative | Companies | companies | vs OpenAPI | postings, 90 d | Compare |
|---|---|---|---|---|---|---|
| 1 | JSONEcma International | 6,396 | 447% | 19,737 | OpenAPI vs JSON → | |
| 2 | XMLW3C | 5,264 | 368% | 12,841 | OpenAPI vs XML → | |
| 3 | Model Context ProtocolAnthropic | 4,892 | 342% | 16,002 | OpenAPI vs Model Context Protocol → | |
| 4 | GraphQLGraphQL Foundation | 4,089 | 286% | 12,076 | OpenAPI vs GraphQL → | |
| 5 | SOAPW3C | 3,661 | 256% | 10,243 | OpenAPI vs SOAP → | |
| 6 | gRPCCloud Native Computing Foundation | 1,753 | 122% | 4,571 | OpenAPI vs gRPC → | |
| 7 | YAMLYAML Language Development Team | 1,029 | 72% | 2,569 | OpenAPI vs YAML → | |
| 8 | Microsoft GraphMicrosoft | 942 | 66% | 2,115 | OpenAPI vs Microsoft Graph → | |
| 9 | ODataOASIS | 844 | 59% | 3,073 | OpenAPI vs OData → | |
| 10 | XSLTW3C | 820 | 57% | 1,501 | OpenAPI vs XSLT → | |
| 11 | CSVIETF | 782 | 55% | 1,180 | OpenAPI vs CSV → | |
| 12 | SAP IDocSAP | 722 | 50% | 2,746 | OpenAPI vs SAP IDoc → | |
| 13 | Apache ParquetApache Software Foundation | 690 | 48% | 1,246 | OpenAPI vs Apache Parquet → | |
| 14 | Protocol BuffersGoogle | 566 | 40% | 1,102 | OpenAPI vs Protocol Buffers → | |
| 15 | Agent2Agent (A2A) ProtocolLinux Foundation | 443 | 31% | 1,572 | OpenAPI vs Agent2Agent (A2A) Protocol → | |
| 16 | PDFAdobe | 405 | 28% | 839 | OpenAPI vs PDF → | |
| 17 | ANSI X12ASC X12 | 371 | 26% | 761 | OpenAPI vs ANSI X12 → | |
| 18 | 337 | 24% | 585 | OpenAPI vs Markdown → | ||
| 19 | 291 | 20% | 551 | OpenAPI vs XML Schema (XSD) → | ||
| 20 | Apache AvroApache Software Foundation | 280 | 20% | 560 | OpenAPI vs Apache Avro → | |
| 21 | ISO 20022ISO | 272 | 19% | 763 | OpenAPI vs ISO 20022 → | |
| 22 | WSDLW3C | 256 | 18% | 511 | OpenAPI vs WSDL → | |
| 23 | UN/EDIFACTUnited Nations | 253 | 18% | 406 | OpenAPI vs UN/EDIFACT → | |
| 24 | RDFW3C | 221 | 15% | 813 | OpenAPI vs RDF → | |
| 25 | 216 | 15% | 703 | OpenAPI vs Web Ontology Language → | ||
| 26 | JSON SchemaJSON Schema organization | 169 | 12% | 301 | OpenAPI vs JSON Schema → | |
| 27 | H.264ITU-T / ISO | 160 | 11% | 327 | OpenAPI vs H.264 → | |
| 28 | XBRLXBRL International | 152 | 11% | 294 | OpenAPI vs XBRL → | |
| 29 | RedfishDMTF | 137 | 10% | 661 | OpenAPI vs Redfish → | |
| 30 | H.265ITU-T | 126 | 9% | 244 | soon | |
| 31 | RSSRSS Advisory Board | 122 | 9% | 321 | soon | |
| 32 | Apache ORCApache Software Foundation | 118 | 8% | 235 | soon | |
| 33 | tRPCtRPC contributors | 106 | 7% | 188 | soon | |
| 34 | RAMLMuleSoft | 105 | 7% | 187 | soon | |
| 35 | Schema.orgSchema.org | 103 | 7% | 148 | soon | |
| 36 | JSON-LDW3C | 99 | 7% | 146 | soon | |
| 37 | DITAOASIS | 96 | 7% | 197 | soon | |
| 38 | YANGIETF | 89 | 6% | 286 | soon | |
| 39 | OpenUSDAlliance for OpenUSD | 88 | 6% | 291 | soon |
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39 api specs data formats are named by companies instead of OpenAPI: JSON by 6,396 companies, XML by 5,264, Model Context Protocol by 4,892, measured from their own job postings. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/openapi/alternatives)
Read from the source, not self-reported
Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →
- RankingCompanies whose own postings name the tool as the team's system, from the Breaknorm technology catalogue T-1.0.1-prov. Editions are folded into their parent product.
- 90-day postingsOpen postings first seen or posted in the last 90 days that name the tool.
- Not includedRatings, prices, feature claims, sponsored positions.
OpenAPI alternatives: questions
What is the most used alternative to OpenAPI?
JSON: 6,396 companies name it in their own job postings, against 1,432 for OpenAPI.
How is this list ranked?
By the number of companies whose own postings name the tool as the team's system (Breaknorm technology catalogue T-1.0.1-prov), then by postings in the last 90 days. No ratings, no vendor input, no sponsored positions.
Does this say which is better?
No. It says who uses what, by company size, industry and country, so you can see which tools companies like yours choose. For features and prices, read the vendors.
Can I get the companies on any of these?
Yes: click the tool, see the first 20 companies, and sign up for the full list with verified e-mails. Counting is free.
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