Is Letta or Serper more stable?

Letta has 0 recorded changes and is rated stable. Serper has 0 recorded changes and is rated stable.

Can I use Letta and Serper together?

While both are in the AI / ML category, some teams use both for different workloads. Check each vendor's free tier limits to see if they complement your stack.

Letta vs Serper Free Tier Comparison

Verdict

Letta offers a free tier ("Free"). Serper has no ongoing free tier; what it offers is a credit grant that runs out ("Free Credits").

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180 days and then lapses on its own, with nothing about the vendor having changed; a standing condition — a free tier withdrawn and not restored, a product retired — does not lapse with time.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.

Letta profile → Serper profile →

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.

Serper

Riskstable

CategoryAI / ML

TierFree Credits

Verified2026-10-21

Last read2026-10-21

Changes0 recorded

Google Search API returning real-time results. 2,500 free queries when you sign up, no credit card required; a plain search uses one credit, and Maps and Lens searches use 3. No Serper page says the free queries renew or expire, and the terms bar registering more than one account. Serper stops accepting queries when the balance reaches zero. Paid credits are prepaid packs with no subscription: Starter is $50 for 50,000 queries ($1.00 per 1,000) at 50 queries per second, valid for 6 months; the largest pack falls to $0.30 per 1,000.

Serper is a business-to-business service. The Terms of Service do not restrict commercial use. The same Terms apply to free and paid queries. (From serper.dev/terms, read 2026-10-29.)

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

API docs →

Letta vs Serper

Verdict

Letta

Serper

Pricing Change History

Letta

Serper

Watch Both Vendors for Pricing Changes

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