Compare Exa and Letta free tiers side by side. Pricing, limits, change history, and risk assessment for developers.

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Exa vs Letta

Side-by-side free tier comparison. Catalogue dates here run to 2026-10-28.

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Verdict

Both Exa and Letta offer free tiers. Exa provides "Free" while Letta offers "Free". Letta has a more stable pricing history (0 recorded changes vs 2).

A verdict here is not a fixed property of the vendor. A one-off pricing event demotes a vendor while its recorded date falls in the last 180 days and then lapses on its own, with nothing about the vendor having changed; a standing condition — a free tier withdrawn and not restored, a product retired — does not lapse with time. A badge carrying a date states the record it rests on; a badge with no date rests on no record in force.

Exa profile → Letta profile →

Exa

Riskcaution 2026-10-01 reduced
CategoryAI / ML
TierFree
Verified2026-10-28
Last read2026-10-28
Changes2 recorded
Web search API for AI agents with Search, Contents, Answer, Monitors and Agent endpoints. The free tier gives $10 in credits each month, up to 2,500 Lite searches, resetting on the first of the month without rollover, plus a one-time $10 onboarding bonus; no credit card or other payment method required. Only a user's first team gets the free credits. Free teams get 10 QPS on search. Search costs $4 per 1,000 requests with up to 10 results for Lite, $7 for Auto, and $12 for Deep. Contents costs $1 per 1,000 pages per content type. Since October 19, 2026, Instant, Fast and Deep Reasoning are legacy search types that keep working at their current prices. Exa recommends Lite in place of Instant and Fast. Search and Contents can also be paid per request over x402 in USDC on Base or Solana, with no API key.
  • When a team's credits run out, requests return 402 Payment Required. Auto recharge is optional. (From exa.ai/docs/admin/billing, read 2026-10-06.)
  • Exa uses anonymized data on default plans to improve its models. Zero Data Retention is available only on Enterprise plans. (From trust.exa.ai/faq, read 2026-10-06.)

Letta

Riskstable
CategoryAI / ML
TierFree
Verified2026-09-27
Last read2026-10-22
Changes0 recorded
Stateful AI agents that keep their memory across sessions. The Free plan is $0/month for the Letta app, CLI and web app: up to 3 stateful agents, 5 MiB of storage per memory repository, limited use of Letta Auto, a limited number of LLM requests on rotating free models, and your own model API keys or coding plans. Free is a Personal Plan; API-key access to the Letta API is sold as a Developer Plan, the API Plan at $20/month plus $0.10 per active agent a month and pay-as-you-go model usage. Pro is $20/month for up to 20 stateful agents. The Letta agent harness is open source (Apache 2.0) and runs on your own infrastructure with no Letta account.

Pricing Change History

Exa

reduced effective 2026-10-01 medium impact
Between 2026-09-16 and 2026-10-01, Exa replaced the $20 sign-up credit with a one-time $10 bonus for completing onboarding, which only a user's first team earns. The $10 monthly credit, available in full on the day of sign-up, continues. Source ↗
reduced effective 2026-07-24 high impact
Between 2026-07-17 and 2026-07-24, Exa replaced its free tier of up to 20,000 requests a month with $10 of credits a month, plus $20 of credits on sign-up. Source ↗

Letta

No recorded pricing changes for Letta.

Watch Both Vendors for Pricing Changes

We do not push notifications. Every change we record is readable the moment it lands, and the JSON answer carries an ETag — send it back as If-None-Match and an unchanged answer costs one 304.

curl https://agentdeals.dev/api/changes?vendor=Exa curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Exa curl https://agentdeals.dev/api/changes?vendor=Letta curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Letta

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