How do their growth rates compare?

AssemblyAI has a month-over-month growth rate of -6.9%; Speko has -7.9%.

How does pricing compare?

AssemblyAI: Freemium, Contact for Pricing. Free trial to start, then pay-as-you-go per audio hour and per add-on feature — for example around $0.15/hr for the Universal-2 model and around $0.21/hr for the more accurate Universal-3.5 Pro model, with extras like diarization billed individually. Enterprise and custom-rate-limit plans are available via sales. Speko: Paid, Contact for Pricing. Two models. On Speko infrastructure, a flat $0.09 per minute bundles STT, LLM and TTS; calls bill from answer to hang-up and unanswered calls cost nothing. With managed routing, you pay the selected provider's published rate plus 5%. $10 in signup credit applies to every account. Phone numbers cost $1 setup and $2 per month for most numbers, and calls on Speko numbers add the carrier charge plus 20%.

What are alternatives to AssemblyAI and Speko?

Other tools in related categories include OpenAI Platform, ElevenLabs, Cartesia, Deepgram Voice AI, Xiaomi MiMo.

AssemblyAI vs Speko — Traffic (453.59K vs 20.95K), Pricing & Verdict

Open AI Tools

AssemblyAI vs Speko — Traffic (453.59K vs 20.95K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	AssemblyAI	Speko
Official Domain	assemblyai.com	speko.ai
Pricing Model	Freemium, Contact for Pricing	Paid, Contact for Pricing
Monthly Visits	453.59K (453,591)	20.95K (20,954)
MoM Traffic Delta	-33.48K (-6.9%)	-1.8K (-7.9%)
Primary Market & Share	🇧🇷 Brazil (30.6%)	🇺🇸 United States (62.2%)
Direct Visits / mo	281.47K	5.93K
User Rating	4.6	4.4
Supported Platforms	Website	Website

AssemblyAI

Speech-to-text and voice intelligence APIs for developers

Async, realtime and sync speech-to-text

Choose pre-recorded transcription for files, a realtime API for live streams and voice agents, or a synchronous endpoint for short clips and dictation.

Audio intelligence and Speech Understanding

Layer summarization, sentiment, topic detection, PII redaction, content moderation and guardrails onto transcripts without building your own models.

Text-to-speech for voice agents

AssemblyAI-TTS-1 is trained on real phone calls for natural, low-latency speech, targeted at IVR and voice-agent use cases.

High accuracy with diarization

Flagship models emphasise exact transcription, speaker labels and native code-switching across many languages, supported by published benchmarks.