Kojo OSVSRetell AI

Data as of November 8, 2026

Which is better, Kojo OS or Retell AI?

Retell AI is a self-serve platform for building AI phone agents, with a visual flow builder, outbound campaigns and usage-based billing. Kojo is a growth agency that installs and runs Kojo OS for you, and can run your ads, SEO and website too.

Feature and pricing breakdown

Features	Kojo OS	Retell AI
Core approach	A growth agency that installs and runs Kojo OS for you	AI voice agent platform; you build and operate the agents
Ease of launch	Kojo builds, tests and launches it; you approve the voice and scripts first	Self-serve signup; implementation support is an add-on
New-lead follow-up	Texted instantly, called within minutes, followed up until they book or say stop	Batch outbound campaigns; a new-lead trigger is not stated
Telephony	Local numbers in your name, signed calls, live transfer with hold music	SIP trunking, carrier numbers, human handoff, branded caller ID on US carriers
Dialer for your team	Power dialer, voicemail drop and live transfer for your own reps	Not stated; live listen-in and takeover on AI calls
Analytics	Speed to lead and booking dashboards; every call recorded and summarized	Post-call analysis, custom metrics, transcripts, optional AI quality checks
Ads	Meta and Google campaigns built in, when your plan includes ads	Not stated
Compliance	SOC 2 Type II hosting, encryption, signed calls and TCPA consent	Lists SOC 2 Type II, ISO 27001, GDPR and HIPAA (attestation letter)
Pricing	One package, terms in writing; ads and add-ons depend on your plan	By the minute plus add-ons; custom enterprise plan
User experience	Ask in plain words in Slack, Claude or ChatGPT; one app for every lead	No-code drag-and-drop builder plus APIs and SDKs

Everything about Retell AI is from its own public website (retellai.com) as of November 8, 2026. "Not stated" means its site did not say, not that it can't. Product names are trademarks of their owners; Kojo Growth is not affiliated with Retell AI. Features and plans change, so check their site before you decide.

Built to book, not just to answer.

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When to use each

Pick Retell AI when you:

Have developers or an operations team that wants to build and tune call flows
Need heavy outbound calling with control over pacing, retries and voicemail
Need enterprise controls such as SSO, role-based access or on-prem deployment

Pick Kojo when you:

Want someone else to install, run and tune the system
Want the same team able to run your ads, SEO and website
Want texting, email, a power dialer and CRM sync in one system
Run a local business without an in-house technical team

Questions owners ask

How does Retell AI charge?

Its pricing page describes pay as you go billing by the minute. The rate depends on the voice, model and add-ons you pick, and there is no annual contract. Enterprise plans use custom pricing.

Does Retell AI support HIPAA and SOC 2?

Its home page says it is compliant with HIPAA, SOC 2 Type II, GDPR and ISO 27001. Its pricing page lists HIPAA and a BAA in a plan comparison, so confirm which plan includes them.

Can Retell AI run outbound calls?

Yes. Its pages describe outbound campaigns where you upload an audience, schedule calls, control pacing and retries, and handle voicemail. Batch calling is listed as an add-on.

Hear Kojo OS call you, then decide.

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