Simba Voice Agents

What Simba Voice Agents does

Simba Voice Agents is a conversational AI voice-agent API product operated under Speechify (legal entity SpeechifyAI), headquartered in Miami, and priced at an all-inclusive $0.07 per minute with 60 free minutes monthly — explicitly marketed as up to 60% cheaper than ElevenLabs. The platform combines speech-to-text (STT), large language model (LLM) processing, and text-to-speech (TTS) into a single real-time voice-agent service, supplemented by SIP-based inbound and outbound telephony, function calling, knowledge-base grounding, cross-call memory, webhook event streaming, and pre-deployment testing and simulation tools. The product is SOC 2 Type II certified, signaling enterprise-readiness in regulated workloads.

The go-to-market is API-first and product-led, targeting developers through free API key signup, comprehensive documentation, and side-by-side comparison pages against eight named competitors (ElevenLabs, Vapi, Retell, Bland, Deepgram, Cartesia, Synthflow, and Hume). A parallel 'Talk to Sales' enterprise channel supports custom pricing and implementation for larger deployments. The company targets four verticals, with Healthcare as primary and Insurance, Real Estate, and Financial Services as secondary, addressing use cases such as patient intake, claims processing, lead qualification, and account servicing.

The business model is purely usage-based — customers pay $0.07 per minute of voice-agent runtime with no platform fee, token math, or separate line items for LLM, STT, TTS, or telephony. This pricing simplicity is positioned as the core competitive lever against the multi-line-item billing structures common among voice-agent incumbents. As a sub-brand of Speechify, Simba benefits from the parent's established text-to-speech and models businesses and a broader 251-500 employee organization, though the firmographic data does not isolate Simba-specific financials, customer counts, or headcount.

Name

Simba Voice Agents

Legal name

SpeechifyAI

Website

https://simbavoice.ai

Company type

Private

Founded year

2025

Operating status

Operating

Headcount range

251–500 employees

Short description

Simba Voice Agents is a Speechify-built API platform offering real-time conversational AI voice agents at $0.07/min all-inclusive pricing, serving developers and enterprises in healthcare, insurance, real estate, and financial services.

Ownership category

akta.pro rank

Product category

Conversational AI Voice Agent Platform

NAICS

Telephone Call Centers (56142), Telemarketing Bureaus and Other Contact Centers (561422)

SIC

Services-Prepackaged Software (7372), Services-Telephone Interconnect Systems (7385)

akta.pro primary industry

Contact Center Speech AI (agent assist, IVR automation) (HDAAAFAL)

akta.pro secondary industries

Contact Center (CCaaS) & Customer Engagement Voice (HDAIAHAF), Workplace Automation & Self-Service (RPA for IT, Chatbots, Virtual Agents) (BPAEAIAI)

Keywords

• Conversational AI platform
• Voice agent API
• Speech synthesis software
• AI telephony services
• Automated call handling

Headquarters

HQ city

Miami

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Infrastructure, Operations

Revenue model

1. Voice Agent API Usage: Usage-based pricing at $0.07 per minute covering all components (LLM, STT, TTS, telephony orchestration) in a single rate. Includes 60 free minutes monthly. Customers pay per minute of voice agent usage with no hidden platform fees or token-based billing.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

Simba Voice Agents offers a real-time voice agent API that combines speech-to-text, large language model processing, and text-to-speech into a single unified API service with SIP-based inbound and outbound telephony. The platform is sold at an all-inclusive rate of $0.07 per minute (covering LLM, STT, TTS, and telephony orchestration) with 60 free minutes monthly, and is targeted at developers building voice agents and at enterprises in healthcare, insurance, real estate, and financial services.

Product overview

Speechify offers a unified voice AI platform centered on the Voice Agents API product. The platform combines speech-to-text (STT), large language model (LLM) processing, and text-to-speech (TTS) into a single real-time voice agent service. Additional products include the Text-to-Speech API and Models offerings. All components are integrated into the Voice Agents API at an all-in pricing rate, with no separate platform fees for LLM, speech, or telephony.

Differentiator

Problem solved

Functional benefit

Brands

• Voice Agents: Real-time voice agents API that listen, think, and speak, with capabilities including tools and function calling, knowledge base, memory, phone numbers and telephony, webhooks and events, and testing and simulation.

Products and services

• Voice Agents API Real-time voice agent API that enables developers to build conversational AI agents capable of listening, thinking, and speaking. Combines STT, TTS, and LLM processing with tools/function calling, knowledge base retrieval, conversation memory, and SIP-based telephony.
• Text-to-Speech Speechify's text-to-speech service that converts written text into spoken audio, offered as a standalone Speechify product and also powering the Voice Agents pipeline.
• Models AI model offerings from Speechify, including proprietary models that power the Voice Agents platform and are available via the unified API.

Quantifiable outcome

• $0.07/min all-inclusive rate vs competitors' platform fee + LLM + STT + TTS + telephony line items

Segments4 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

AI capability7 records

Feature7 records

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Emerging players

• Hume AI: Hume AI offers an emotionally intelligent voice-to-voice conversational AI platform with its own STT/TTS/voice-UI stack. It is named in Simba's comparison pages and competes for the same developers building agent experiences.
• Cartesia: Cartesia builds real-time voice models and is moving up the stack into voice-agent infrastructure. Speechify lists Cartesia as a competitor, indicating overlap in low-latency speech for conversational AI agents.

Direct peers

• Vapi: Vapi provides a developer-first voice-agent API with function calling, telephony, and tools—an essentially identical product surface to Simba. Speechify publishes a direct comparison page against Vapi, signaling overlapping target customers and similar enterprise/mid-market use cases.
• ElevenLabs: ElevenLabs offers a conversational AI agents platform combining TTS, STT, and LLM orchestration with telephony integration. Speechify explicitly positions Simba as up to 60% cheaper than ElevenLabs, making ElevenLabs the most direct comparator on both product surface and pricing.
• Deepgram: Deepgram provides speech-to-text, text-to-speech, and an emerging voice-agent stack. Although historically known for speech models, Deepgram is now competing in the full voice-agent API surface and is a named comparator for Simba.
• Retell AI: Retell AI is a real-time voice agent platform with function calling, knowledge base, telephony, and testing capabilities. The product and developer experience closely mirror Simba's, and Retell is listed as a direct competitor on Simba's own comparison pages.
• Bland AI: Bland AI builds enterprise-grade voice agents with telephony, function calling, and knowledge base integrations. It is named explicitly in Simba's comparison pages and targets the same API-first developer and enterprise customer segments.
• Synthflow: Synthflow offers no-code and API-based AI voice agents for sales and support workflows, including telephony and CRM integrations. It is listed by Speechify as a direct competitor and serves the same SMB/mid-market voice-automation use cases.

Broad incumbents

• Twilio: Twilio offers programmable telephony, the underlying SIP/voice APIs, plus a growing conversational AI stack (including Voice Agents on its own infrastructure). It is a broad incumbent that competes both at the telephony layer and increasingly at the voice-agent application layer.
• Cresta: Cresta provides contact-center AI including voice agents, agent assist, and real-time coaching for enterprise call centers. It targets the same enterprise CCaaS replacement/augmentation use cases Simba goes after with its API.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key highlights7 records

Customer concentration

• Xx.com/SpeechifyAI
• LinkedInlinkedin.com/company/speechifyx

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Simba Voice Agents