Voice & audio

Speko

By speko.ai

Speko is a strong fit for voice-agent teams that want to switch stt, llm and tts providers without rewriting the stack, with a profile optimized for advanced users who value medium ease-of-use and medium output quality.

Best for: Voice-agent teams that want to switch STT, LLM and TTS providers without rewriting the stack

What it is

Provider-neutral routing layer for multilingual voice agents that benchmarks and selects speech-to-text, language-model and text-to-speech providers by language, quality, latency and cost, with pre-response failover.

In Choosely terms, this sits in the voice & audio lane and is commonly selected for voice-agent teams that want to switch stt, llm and tts providers without rewriting the stack and multilingual deployments where model quality varies materially by language.

Pricing

Public-preview Router pricing is the selected provider's published rate plus 5%. Speko Infrastructure bundles STT, LLM and TTS for $0.09/minute. Every account receives $100 in signup credit; Enterprise pricing is custom. Preview plans have no SLA or commitment.

Basis: Usage BasedConfidence: VerifiedLast checked: September 2026

Why people pick it vs where it falls short

Why people pick it

  • Routes all three voice-agent model legs behind one public API and customer-side gateway
  • Publishes a clear public-preview price boundary for managed routing and bundled infrastructure
  • Gateway documentation includes signed session plans, replay protection and a local BYOK path

Where it falls short

  • Public preview has no SLA, and independent production evidence is still limited
  • Provider rankings and benchmarks are operated by Speko, so teams should reproduce quality and latency tests on their own traffic
  • Routing does not remove provider-specific privacy, residency, retention or outage risk

When it is a strong fit

A strong match when your main priority is voice-agent teams that want to switch stt, llm and tts providers without rewriting the stack and you need an advanced-friendly starting point.

Useful when your team values medium ease of use and fast execution over heavier setup.

Best when medium quality matters, but you still want a practical workflow rather than a complex implementation track.

How it compares in Choosely terms

  • Speed profile: Fast. This is best when you want momentum from prompt to usable output without heavy process overhead.
  • Ease profile: Medium for Advanced users. You can move quickly even if this is not your full-time specialty.
  • Control profile: High. Expect practical customization, but not an infinite-control architecture.
  • Pricing signal: Usage-based. Good for teams balancing capability with cost sensitivity.
Tradeoff: Public preview has no SLA, and independent production evidence is still limited.

Best-fit use cases

Practical ways Speko fits the current Choosely catalog profile.

Provider Neutral Router For Speech To Text Llm And Text To Speech

Strong lane

Use Speko for provider neutral router for speech to text llm and text to speech when you want fast execution, medium ease of use, and medium output quality.

Multilingual Voice Agent Model Routing By Quality Latency And Cost

Strong lane

Use Speko for multilingual voice agent model routing by quality latency and cost when you want fast execution, medium ease of use, and medium output quality.

Voice Provider Failover Without Rewriting The Application

Strong lane

Use Speko for voice provider failover without rewriting the application when you want fast execution, medium ease of use, and medium output quality.

Benchmark And Switch The Three Legs Of A Production Voice Stack

Strong lane

Use Speko for benchmark and switch the three legs of a production voice stack when you want fast execution, medium ease of use, and medium output quality.

Alternatives

Vapi

Developer-first voice AI platform for creating programmable phone agents and real-time voice workflows over API infrastructure.

Choose Vapi if output quality consistency matters more than raw speed.

Retell AI

AI voice-agent platform for building production phone agents that answer inbound calls, place outbound calls, qualify leads, book appointments, and hand off to business systems.

Choose Retell AI if output quality consistency matters more than raw speed.

Synthflow

No-code AI phone-agent platform for inbound and outbound business calls, appointment booking, lead qualification, and CRM-integrated calling workflows.

Choose Synthflow if output quality consistency matters more than raw speed.

ElevenLabs

Voice tool for realistic narration, voiceovers, dubbing, and spoken audio content.

Choose ElevenLabs if output quality consistency matters more than raw speed.

Next step

Replay representative calls in every target language through Speko and your current providers, then compare transcription accuracy, response latency, failover behavior, total per-minute cost and data handling before routing production traffic.

Related reads

FAQ

What is Speko best for?

Speko is best for voice-agent teams that want to switch stt, llm and tts providers without rewriting the stack, multilingual deployments where model quality varies materially by language, developer-owned voice infrastructure that needs measured selection and pre-response failover.

Is Speko beginner-friendly?

This catalog profile lists Speko at advanced skill level with medium ease of use.

What should I watch out for before choosing Speko?

Public preview has no SLA, and independent production evidence is still limited