Retell gives developers low-latency voice infrastructure with itemized pricing — voice infra at $0.055/min plus TTS, LLM, and telephony add up to ~$0.11/min typical. SpeechifyAI rolls it into one all-in rate from $0.07/min with LLM included, plus deterministic workflows, tool calling + webhooks, and governance, and 60 free minutes a month.
| Capability | SpeechifyAI | Retell |
|---|---|---|
| Pricing | From $0.07/min all-in — LLM included · 60 free min/mo | ~$0.11/min typical ($0.055 infra + TTS + LLM + telephony) |
| What's included | LLM + STT + TTS + orchestration in one rate | Itemized add-ons (KB +$0.005, PII +$0.01, AI QA +$0.10/min) |
| Billing | Per second of talk time | Per second, but charged during silence/hold |
| Free tier | 60 min/mo, commercial use | $10 free credits + 20 free concurrent calls |
| Workflow design | Visual + code, deterministic branching | Drag-and-drop builder + real-time function calling |
| Integrations | Tool calling + webhooks | Build-your-own via custom functions |
| Compliance | SOC 2 Type II | SOC 2 |
| Support model | Forward-deployed engineers on Enterprise | Email / Slack community |
SpeechifyAI is one per-minute rate with the LLM included. Most competitors quote a platform fee, then bill the LLM and telephony on top. Drag your monthly minutes and switch the competitor to see the difference. Rates are from each vendor's public pricing.
One line item. No passthrough, no token math.
Rates vary by usage, region, and contract.
SpeechifyAI at the $0.07/min Pro rate, LLM included; Scale drops to $0.068 and Enterprise to $0.06. Competitor "+" items are billed separately on top of the platform fee, so a competitor's true all-in is higher than its headline rate.
| Monthly volume | SpeechifyAI, all-in ($0.07/min) | Retell typical all-in (~$0.11/min) | You save |
|---|---|---|---|
| 1,000 min · ≈200 calls | $70/mo | from $110/mo | $40/mo + |
| 6,000 min · ≈1,200 calls | $420/mo | from $660/mo | $240/mo + |
| 20,000 min · ≈4,000 calls | $1,400/mo | from $2,200/mo | $800/mo + |
The "+" marks the LLM and telephony Retell bills separately on top of the platform fee — so the true saving is larger than the platform-fee gap shown.
Retell bills you for every second the websocket is open, so silence, hold music, and the caller fumbling for a confirmation number all count against the rate. SpeechifyAI bills per second of talk time instead, so the quiet moments cost nothing, and a long call with hold music or a transfer wait costs noticeably less at the end of the month.
Retell itemizes the bill with $0.055 for infra plus TTS plus telephony plus per-minute add-ons like Knowledge Base, PII redaction, and AI QA stacking on top. SpeechifyAI folds the same compliance posture (SOC 2 Type II, SSO, RBAC, encryption) into the platform fee on a single per-minute rate from $0.07 on Pro, with the visual workflow editor, tool calling, webhooks, and simulated test callers all included instead of priced as line items.
SpeechifyAI covers a production voice agent at one rate from $0.07 a minute, billed on talk time instead of connection time, with the LLM, telephony, workflows, tool calling, and SOC 2 Type II compliance already in the platform fee instead of stacked as separate per-minute line items.