OpenAI Realtime API vs Parloa

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

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OpenAI Realtime API and Parloa land in a dead heat overall, both scoring 8 out of 100, though the path there differs. OpenAI Realtime API shows up in 9 of 60 answers, doing best on lowest-latency questions (named in 2 of 3 answers), but it's never mentioned for call analytics, receptionist duty, contact centres, small business phone agents, or open-source frameworks. Parloa is named in 10 of 60 answers and sweeps the contact-centre question, appearing in all 3 answers there, while going unmentioned for languages, appointment booking, and small business use. Head-to-head, each wins 5 questions, with 10 ties between them.

Head to head

metric	OpenAI Realtime API	Parloa
score	8	8
questions won	8	8

By assistant

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

Parloa

assistant	score	named in, this week	usual spot, this week
ChatGPT	2	5% of answers	#8.0
Claude	18	40% of answers	#9.4
Gemini	not sampled this week
Perplexity	5	5% of answers	#1.0

Where they differ

Only OpenAI Realtime API gets named for

Which AI voice agent has the lowest latency?
What's the best AI voice agent for languages other than English?
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?

Only Parloa gets named for

What's the best enterprise voice AI platform for contact centres?
What's the best AI voice agent that can transfer to a human?
What's the best voice AI that connects to my CRM?
What's the best no-code tool to build a voice AI agent?
What's the best voice AI platform with its own phone numbers and telephony?

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