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Free databases and key-value stores

Usable hosted databases, vector stores and key-value stores.

Ranked byverdict, best first, then the evidence · 18 ranked

Key
★ qualifies
usable as stated; the read path was probed
caveat
usable, with a named limit or an unprobed read path
trial
a time-boxed or one-time trial, not a recurring allowance
paid
no free allowance; listed for its price
fails: identity
the identity required is not reachable without it
fails: egress
data cannot be read back out at a usable rate or price
fails: quota
the free allowance is too small to matter
dead
the offer or the service no longer exists
self-hosted, last resort
software or a node that the user installs, runs and maintains. Self-hosted options are listed last, because this site is for users who have no hardware.
free tier, no free tier
the record states a free allowance, or states that it has none
identity email
what a signup asks for. A question mark after it: a placeholder, not read from a source
no card, card, card?
a payment card is not asked, is asked, or the record does not say
limit
the limit that runs out first, for example request-rate or volume-quota
evidence
how the record is backed, strongest first: measured, documented, reported, inferred, unverified
fresh until, stale since
the check is inside its window, or past it, on today's date
inherited, checked live
inherited: the record was carried from an earlier source, and its check date is an upper bound. Checked live: the record was checked against the service. The chip filters on it
verdict
a judgement of the whole offer for the need of its topic. The data holds no number as a cut-off. Read the free allowance and the limits of the record, and decide for your own need
duplicate, disagrees
another record holds the same offer, or a sibling record states another value

How to read a record

  1. ★ qualifiesUpstash Redis (Databases and KV)USD 250/TB-month

    250 MB data; 500,000 commands per month; 10 GB bandwidth per month; 10,000 commands per second; one database

    free tieridentity anonymousno cardlimit request-rateevidence measuredstale on 2026-12-22

  2. ★ qualifiesCloudflare D1USD 750/TB-month

    10 databases; 500 MB per database; 5 GB per account; 5 million rows read per day; 100,000 rows written per day

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  3. ★ qualifiesCloud Firestore (firestore)

    1 GiB stored, 50,000 document reads per day, 20,000 writes per day, 20,000 deletes per day, exactly one free database per project

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  4. ★ qualifiesQdrant Cloud

    Free tier cluster with 1 GB RAM and 4 GB disk, no high availability, one cluster

    free tieridentity emailno cardlimit per-object-capevidence documentedstale on 2026-11-22

  5. ★ qualifiesTiDB Cloud Starter

    25 GiB row storage plus 25 GiB columnar storage and 250 million Request Units per month, per organization across up to five instances

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  6. ★ qualifiesTurso (Databases and KV)

    100 databases; 5 GB storage; 500 million rows read per month; 10 million rows written per month; 3 GB sync

    free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-11-22

  7. caveatNeon (Lakebase Postgres)

    100 projects; 100 CU-hours per project; 1 GB Postgres storage per project and 20 GB per account; 10 branches per project; 5 GB public network transfer per...

    free tieridentity emailno cardlimit request-rateevidence measuredstale on 2026-12-22

  8. caveatRailway (Databases and KV)

    Free plan: "Free — $0/month with $1 of monthly usage credits." A new account starts on the Free Trial, "$5 in credits for 30 days", and reverts to Free when...

    free tieridentity emailno cardlimit volume-quotaevidence documentedstale on 2026-12-03

  9. caveatCockroachDB Cloud Basic

    'When you sign up for CockroachDB Cloud, your new organization's account starts with $400 in free credits, allowing you to try the product at no cost.' The...

    free tieridentity emailcardlimit retention-clampedevidence documentedstale on 2026-11-23

  10. caveatAiven

    Free plan with 1 GB RAM and 1 GB total storage per service, on Postgres, MySQL, Valkey, Kafka and OpenSearch; free indefinitely with no time limit, but the...

    free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-11-22

  11. caveatCloudflare Workers KV

    100,000 reads per day; 1,000 writes per day; 1 GB per account; 1,000 namespaces

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  12. caveatAmazon DynamoDB (dynamodb)USD 250/TB-month

    25 GB storage, 25 read capacity units and 25 write capacity units, per region per payer account, always free

    free tieridentity cardlimit per-ip-shapingevidence documentedstale on 2026-11-22

  13. caveatMongoDB Atlas (free cluster, formerly M0)

    0.5 GB of data storage on a shared cluster with three-node replication, one free cluster per project, free forever

    free tieridentity emailno cardlimit per-ip-shapingevidence documentedstale on 2026-11-22

  14. caveatNile

    50 million query tokens a month, unlimited databases and unlimited tenants per workspace, 1 GB storage included, up to 500 connections, in one region, with...

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  15. caveatPineconeUSD 330/TB-month

    Starter: 2 GB serverless storage, 5 indexes, 1 project, 1 GB egress per month, us-east-1 only

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  16. caveatPrisma Postgres

    200,000 operations per month, 2 GB storage, 50 databases, 10 direct connections, and Prisma Compute with 1 million requests

    free tieridentity emailno cardlimit request-rateevidence documentedstale on 2026-11-22

  17. caveatSupabase (Databases and KV)

    500 MB database on Shared CPU with 500 MB RAM; 2 active projects; 5 GB egress and 5 GB cached egress; unlimited API requests

    free tieridentity emailno cardlimit retention-clampedevidence documentedstale on 2026-11-22

  18. caveatWeaviate Cloud

    1 cluster per user, 100,000 objects, 1 GB memory, 10 GB disk, 1 collection, up to 3 tenants, always free

    free tieridentity emailno cardlimit per-object-capevidence documentedstale on 2026-11-22

The query
SELECT rid, vorder FROM record WHERE topic='databases-kv' AND grp='usable' AND duplicate_of IS NULL AND coalesce(summary,'') NOT LIKE 'no free %' AND coalesce(summary,'') NOT LIKE 'no published free %' AND coalesce(summary,'') NOT LIKE 'no perpetual free %'
ORDER BY self_hosted, vorder ASC NULLS LAST

Run it yourself: /api/v1/need/databases, or the MCP tool need.