OpenAI Agents SDK VS PydanticAI
As of 30 October 2026, PydanticAI is named by 137 companies and OpenAI Agents SDK by 140; OpenAI Agents SDK skews to companies under 200 people (41% vs 49%), PydanticAI to companies over 1,000 (28% vs 36%).
As of 30 October 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
The website-and-DNS footprint is not comparable between a marketing suite and a CRM: OpenAI Agents SDK's script and mail records show on hundreds of thousands of small sites, PydanticAI rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- OpenAI Agents SDK: 2–200 employees
- 41%
- PydanticAI: 2–200 employees
- 49%
- OpenAI Agents SDK: 1,000+ employees
- 36%
- PydanticAI: 1,000+ employees
- 28%
- Postings per company, 90 days
- 2.7 · 2.0
- Website or DNS footprint
- 0 · 0
Who chooses which
Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.
| Segment | OpenAI Agents SDK | share | PydanticAI | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 1 | 1% | 6 | 4% | PydanticAI |
| 2-10 employees | 11 | 8% | 15 | 11% | PydanticAI |
| 11-50 employees | 19 | 14% | 25 | 18% | PydanticAI |
| 51-200 employees | 28 | 20% | 27 | 20% | even |
| 201-500 employees | 18 | 13% | 15 | 11% | even |
| 501-1000 employees | 12 | 9% | 11 | 8% | even |
| 1001-5000 employees | 24 | 17% | 20 | 15% | OpenAI Agents SDK |
| 5001-10000 employees | 9 | 6% | 7 | 5% | even |
| 10,001+ employees | 18 | 13% | 11 | 8% | OpenAI Agents SDK |
| Segment | OpenAI Agents SDK | share | PydanticAI | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 80 | 57% | 74 | 54% | OpenAI Agents SDK |
| Business & finance services | 36 | 26% | 31 | 23% | OpenAI Agents SDK |
| Manufacturing & industry | 6 | 4% | 5 | 4% | even |
| Health care | 4 | 3% | 4 | 3% | even |
| Public, community & associations | 3 | 2% | 6 | 4% | PydanticAI |
| Media & content | 3 | 2% | 6 | 4% | PydanticAI |
| Consumer services & leisure | 2 | 1% | – | – | outside top 12 |
| Property & construction | 2 | 1% | 1 | 1% | even |
| Utilities & infrastructure | 2 | 1% | 3 | 2% | even |
| Commerce & trade | 1 | 1% | 3 | 2% | even |
| Hospitality & travel | 1 | 1% | 1 | 1% | even |
| Transport, logistics & rental | – | – | 2 | 1% | outside top 12 |
| Automotive | – | – | 1 | 1% | outside top 12 |
| Segment | OpenAI Agents SDK | share | PydanticAI | share | Leans |
|---|---|---|---|---|---|
| United States | 92 | 66% | 80 | 58% | OpenAI Agents SDK |
| United Kingdom | 9 | 6% | 7 | 5% | even |
| Germany | 8 | 6% | 13 | 9% | PydanticAI |
| France | 5 | 4% | 8 | 6% | PydanticAI |
| Australia | 3 | 2% | 4 | 3% | even |
| Canada | 3 | 2% | 3 | 2% | even |
| Sweden | 3 | 2% | 2 | 1% | even |
| United Arab Emirates | 2 | 1% | – | – | outside top 12 |
| Spain | 2 | 1% | – | – | outside top 12 |
| India | 2 | 1% | – | – | outside top 12 |
| Argentina | 1 | 1% | – | – | outside top 12 |
| BD | 1 | 1% | – | – | outside top 12 |
| Netherlands | – | – | 4 | 3% | outside top 12 |
| Belgium | – | – | 2 | 1% | outside top 12 |
| Italy | – | – | 2 | 1% | outside top 12 |
| Austria | – | – | 1 | 1% | outside top 12 |
| Bulgaria | – | – | 1 | 1% | outside top 12 |
| Segment | OpenAI Agents SDK | share | PydanticAI | share | Leans |
|---|---|---|---|---|---|
| Data & AI | 244 | 55% | 236 | 68% | PydanticAI |
| Software engineering | 80 | 18% | 72 | 21% | PydanticAI |
| Sales | 21 | 5% | 6 | 2% | OpenAI Agents SDK |
| IT operations & business systems | 19 | 4% | 2 | 1% | OpenAI Agents SDK |
| Product, program & project management | 8 | 2% | – | – | outside top 12 |
| General management & consulting | 6 | 1% | 2 | 1% | even |
| Administration & office | 1 | 0% | – | – | outside top 12 |
| Customer service & success | 1 | 0% | – | – | outside top 12 |
| Engineering (non-software) | 1 | 0% | 4 | 1% | even |
| Finance & accounting | 1 | 0% | – | – | outside top 12 |
The companies behind each column
Companies using OpenAI Agents SDK →
Companies using PydanticAI →
llm app frameworks ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
PydanticAI is named by 137 companies in job postings and OpenAI Agents SDK by 140; 29 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/openai-agents-sdk-vs-pydantic-ai)
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 →
- Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
- Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
- SegmentsCountry, size and industry from the company profile built from its website.
- Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
OpenAI Agents SDK vs PydanticAI: questions
Which is more used, OpenAI Agents SDK or PydanticAI?
By companies naming it in their own job postings, OpenAI Agents SDK (140) over PydanticAI (137). By website-and-DNS footprint, PydanticAI (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses OpenAI Agents SDK?
41% of OpenAI Agents SDK companies have 2 to 200 employees, against 49% for PydanticAI. 36% of OpenAI Agents SDK companies have over 1,000 employees, against 28% for PydanticAI.
Do companies run both?
29 companies name both in their postings, usually OpenAI Agents SDK in marketing and PydanticAI in sales, or during a migration.
Where do these numbers come from?
From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.
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