Mastra vs Retell AI

Mastra vs Retell AI, compared side by side on 23 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Mastra is on 77/100 and Retell AI on 63/100.

Mastra logo
MastraAn open-source TypeScript/JavaScript framework for building AI agents, from the creators of Gatsby.
Try Mastra
Retell AI logo
Retell AIVoice AI agent platform handling more calls per second than the US 911 system, $60M ARR with a 35-person team.
Try Retell AI

Where each one leads

Mastra

  • our overall score: 77/100 against 63/100
  • headcount: 53 against 35
  • funding raised: $35.5M against $14.0M

Retell AI

  • LinkedIn following: 20,979 against 6,591

At a glance

MeasureMastraRetell AI
What it isAn open-source TypeScript/JavaScript framework for building AI agents, from the creators of Gatsby.Voice AI agent platform handling more calls per second than the US 911 system, $60M ARR with a 35-person team.
CategoryAgentic AI, AI Agents, Developer Tools, Open SourceAgentic AI, AI Agents, AI Voice Synthesis, AI Voice Cloning
Sells toBusiness modelB2BB2B
OfferingPlatformPlatform
Founded20242023
HeadquartersSan Francisco, United StatesSan Francisco, United States
StatusActiveActive

Size, funding and growth

MeasureMastraRetell AI
Employees5335
Headcount growthLast 12 months+204.5%Not published
Total funding$35.5M$14.0M
Latest roundSeries ASeed
LinkedIn followers6,59120,979

StartupHub scores

Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.

MeasureMastraRetell AI
StartupHub scoreOur 0-100 rating77/10063/100
Traction70/10066/100
Team90/10060/100
Community38/1008/100
Search visibility68/10048/100
Quality78/10068/100
Agent readinessHow well an AI agent can read and act on the siteD (58/100)C (61/100)
Domain ratingLink authority, 0-10076/10076/100

Technology

Detected on each public site, so it reflects the marketing stack as well as the product.

MeasureMastraRetell AI
HostingVercelNot detected
CDNVercelCloudflare
CMSNot detectedWebflow
FrameworksNext.js, Tailwind CSSNot detected
AnalyticsNot detectedGoogle Analytics 4, Google Tag Manager, Mixpanel, Linkedin Insight +1 more
Open sourceYes, 15,100 GitHub starsNo
Self-hostableYesNo

Product and pricing

MeasureMastraRetell AI
Key featuresAI Agent Framework, Workflows, RAG, Evals, Memory & Tool Selection, Open Source & ModularAI Voice Agent Platform, Auto-Sync Knowledge Base, Powerful Call Transfer, Easy Appointment Booking, IVR Navigation & Batch Calling, Compliance & Scalability

What users say

MeasureMastraRetell AI
Community ratingVisitor votes on StartupHub5.0/5 from 2 votesNot published

Mastra vs Retell AI: common questions

Which is better, Mastra or Retell AI?

On our 0-100 score Mastra rates higher (77/100 against 63/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 23 data points above: read the rows that match what you are buying for.

How do Mastra and Retell AI compare on the numbers?

Mastra leads on our overall score (77/100 against 63/100), headcount (53 against 35), funding raised ($35.5M against $14.0M). Retell AI leads on LinkedIn following (20,979 against 6,591).

Read the full Mastra review and pricing or the Retell AI review and pricing. You can also browse other Mastra alternatives we track.