Cognigy vs OpenAI Realtime API

as AI assistants see them, week of 2026-09-21

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Cognigy and OpenAI Realtime API both stay on the fringes of AI answers, with overall scores of 6 and 8 out of 100. Cognigy shows up in 6 of 60 answers, doing best on enterprise contact-centre questions, named in 2 of 3 answers there, but never mentioned for call analytics, AI receptionists, appointment booking, inbound support, or small-business phone agents. OpenAI Realtime API appears slightly more, in 9 of 60 answers, and leads on latency questions, named in 2 of 3 answers. Head-to-head, OpenAI Realtime API is named more often in 5 questions versus Cognigy's 2, with 13 ties. Claude rates OpenAI Realtime API highest at 22.

Head to head

metric	Cognigy	OpenAI Realtime API
score	6	8
questions won	5	8

By assistant

Cognigy

assistant	score	named in, this week	usual spot, this week
ChatGPT	4	5% of answers	#2.0
Claude	5	10% of answers	#7.5
Gemini	not sampled this week
Perplexity	10	15% of answers	#4.7

OpenAI Realtime API

assistant	score	named in, this week	usual spot, this week
ChatGPT	3	5% of answers	#7.0
Claude	22	40% of answers	#6.5
Gemini	not sampled this week
Perplexity	0	0% of answers

Where they differ

Only Cognigy gets named for

What's the best enterprise voice AI platform for contact centres?
What's the best no-code tool to build a voice AI agent?

Only OpenAI Realtime API gets named for

Which AI voice agent has the lowest latency?
Which voice AI platform sounds the most natural?
Which voice AI platform is best for developers?
What's the best AI voice agent for booking appointments?
What's the best AI voice agent for inbound customer support calls?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full AI voice agents leaderboard