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Curated collection

AI Agent Tools With Usage-Based Pricing

22 of the 147 tools in our index bill by usage rather than a flat seat or subscription fee — per minute, per resolution, per token, or per dollar of compute. For 4 of them, the rate you would actually pay per unit is never published: it is set in a sales call.

Browse the 22 agents ↓Selection criteria

"Usage-based" sounds like the transparent option: pay only for what you use, and calculate your own cost before you sign up. That holds for all but four of these 22 tools, which publish an actual number you can price your own usage against: [Vapi](/vapi) at $0.05/minute, [Bland AI](/bland-ai) at $0.14/minute, [Intercom Fin](/intercom-fin) at $0.99/resolution, [OpenAI Realtime API](/openai-realtime-api) at $32/$64 per million audio tokens, [Webhound](/webhound) from $1 for a narrow research check. That is a real rate card in every case, whatever the unit. [Devin](/devin) sells the meter as a unit budget rather than a per-minute rate: a free tier, then Pro at $20/month and Max at $200/month, all billed by the Agent Compute Unit the work actually consumes.

At a glance

agents
22
curated for this set
Free to start
7 of 22
a free or freemium entry tier
Public API
17 of 22
5 more only on a paid tier
Publish a price
17 of 22
an anchor price on their own page
What this collection covers

It breaks for the other four. [Sierra](/sierra), [Decagon](/decagon), [Ada](/ada) and [PolyAI](/polyai) each state their pricing model in the abstract, as "outcome-based," "per minute" or "per conversation," then list "Custom" where the actual number should be; none publishes a rate card or offers self-serve signup, and independent purchase-data estimates (not vendor figures) are the only cost signal available for any of the four.

The free-tier split tracks this same divide closely: [Manus](/manus), [ElevenLabs Conversational AI](/elevenlabs-conversational-ai) and [Genspark](/genspark), 3 of these 22, let you run real usage at $0 before paying anything, and all three sit in the public-rate group. None of the sales-led, custom-quoted tools offers any free tier or self-serve path at all.

By category, the filter bites hardest in [support agents](/category/support-agents): 8 of 14 bill by usage, the highest share of any category here, and support is where the outcome-based, sales-quoted pattern concentrates. [Voice agents](/category/voice-agents) contribute the same number of entries from a larger pool, 10 of 23, where per-minute billing is close to the category default. [Research & data agents](/category/research-agents) add 3 of 13, and [coding agents](/category/coding-agents) 2 of 29.

How these 22 agents were picked

A tool earns a place here if its own Published, sourced listing records `attributes.pricingModel` as `usage-based`: billed by a metered unit (minutes, resolutions, tokens, dollars of compute) rather than a flat per-seat subscription or one-time fee. Within that set, each entry's own `pricingTiers` data was read directly for whether the vendor publishes an actual per-unit number a buyer could use to estimate cost before signing up, or states the pricing model without the rate (`priceDisplay: 'Custom'`, sales-led only, no self-serve signup), and separately whether an ongoing $0 tier exists (a limited free trial or one-time signup credit does not count as a free tier). Every number cited is the listing's own already-researched, sourced figure; where a figure is a third-party estimate rather than the vendor's own published number, the entry says so explicitly, exactly as the source listing does.

The 22 agents on this shelf

Browse wider than this shelf

A collection is one cut through the index. These are the full categories the agents above sit in, unfiltered.

All Voice agents All Agent platforms All Support agents All Research & data agents All Coding agents Every collection

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