TiDB Cloud and YugabyteDB are both distributed SQL databases with free entry points and vector search support for AI workloads, but they differ in SQL…
Best for TiDB Cloud: Teams on a MySQL-compatible stack who want unified transactional, analytical, and vector search (HTAP) in one engine, with a genuinely free Starter tier (25GiB row + 25GiB column storage, 250M Request Units/month) before pay-as-you-go charges apply.
Best for YugabyteDB: Teams migrating existing PostgreSQL applications who need multi-region high availability and disaster recovery built in, and are comfortable with vCPU-based managed pricing starting at $125/vCPU/month, or running the open-source version themselves for free.
At a Glance
TiDB Cloud
YugabyteDB
Primary category
Databases
Databases
Rating
Not documented
Not documented
Pricing model
usage-based
freemium
Starting price
Free (Starter serverless tier with monthly usage quota)
Free (open-source Community Edition); YugabyteDB Aeon is usage-based with a free trial
Free plan
Yes
Yes
Free trial
Not documented
Not documented
Platforms
Not documented
Not documented
Team collaboration
Not documented
Not documented
AI features
Yes
Yes
Public API
Yes
Yes
Key Differences
SQL dialect compatibility
TiDB Cloud: MySQL-compatible SQL, with integrations for LangChain, LlamaIndex, and MCP.
YugabyteDB: Full PostgreSQL compatibility, including stored procedures, triggers, and extensions from the PostgreSQL ecosystem.
Determines migration effort for teams with an existing MySQL versus PostgreSQL codebase.
Entry-level pricing model
TiDB Cloud: Starter plan includes a genuine free monthly allowance (25GiB row storage, 25GiB column storage, 250M Request Units) before usage-based charges.
YugabyteDB: Aeon Standard plan starts at $125/vCPU/month; a free-tier Aeon account is available to get started, and the open-source version can be self-hosted for free.
Affects how much a team can build and test before incurring meaningful cost.
Founding year
TiDB Cloud: Founded 2015.
YugabyteDB: Founded 2016.
Company maturity and track record can factor into vendor risk assessment, though both are close in age.
Workload unification
TiDB Cloud: Unified HTAP engine combining transactional, analytical, and native vector query capabilities in one system, with dedicated Request Unit-based workload isolation.
YugabyteDB: Emphasizes multi-region high availability, automatic sharding/scaling, and multi-model support across relational, document, and graph-style workloads.
Determines whether the priority is combining transactional and analytical workloads in one engine, or geographic resilience and data-model flexibility.
Add-on pricing for enterprise security/DR
TiDB Cloud: Essential and Premium tiers are labeled "(Preview)" and may still change; Premium starts at $1,800/month.
YugabyteDB: Enterprise Security and Business Continuity/DR are separate Aeon add-ons at $25/vCPU/month each on top of base compute pricing.
Affects total cost once enterprise security or DR features are added.
Feature-by-Feature
SQL Compatibility & Workloads
Feature
TiDB Cloud
YugabyteDB
SQL dialect
Available
Available
Native vector search
Available
Available
HTAP (unified transactional + analytical)
Available
Not documented
Multi-model (document/graph)
Not documented
Available
Pricing & Plans
Feature
TiDB Cloud
YugabyteDB
Free tier/allowance
Available
Available
Published managed starting price
Available
Available
Enterprise custom tier
Not documented
Available
Availability & Scaling
Feature
TiDB Cloud
YugabyteDB
Multi-cloud support (AWS/GCP/Azure)
Available
Available
Multi-region high availability/DR
Not documented
Available
Elastic/scale-to-zero autoscaling
Available
Not documented
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
TiDB Cloud
Starter (Serverless) — Free up to quota, then usage-based pay-per-use
Essential — From approximately $400 per month monthly
Dedicated — From approximately $0.44 per hour per node hourly
YugabyteDB
Community Edition — $0 n/a
YugabyteDB Aeon Standard — Usage-based (credit consumption); free trial available consumption-based
YugabyteDB Aeon Professional — Usage-based (credit consumption); contact for details consumption-based
Pros & Cons
TiDB Cloud
Pros
MySQL compatibility lowers the barrier to migrating existing applications
Generous free quota on the serverless Starter tier for smaller workloads
Combines transactional and analytical processing without a separate data warehouse
Strong horizontal scalability for large or fast-growing datasets
Active open-source project with a large GitHub community and star count
Cons
Pricing structure spans multiple tiers and billing units, which can be complex to estimate upfront
Smaller surrounding tooling ecosystem than traditional MySQL or PostgreSQL
Distributed-systems concepts add a learning curve versus a single-node database
Premium regions such as Singapore, Tokyo, and Frankfurt cost more than standard US regions
YugabyteDB
Pros
Open-source core with a permissive Apache 2.0 license allows free, unrestricted self-hosted use
PostgreSQL compatibility lowers the migration barrier for teams already using PostgreSQL
Built-in horizontal scaling and multi-region resilience avoid the need for custom application-level sharding
Aeon's bring-your-own-cloud option supports data residency and compliance requirements for global businesses
Founded by engineers with distributed systems experience from Facebook, lending credibility for mission-critical workloads
Cons
Distributed SQL databases generally add operational complexity compared to a simple single-node PostgreSQL instance
Consumption-based Aeon pricing can be harder to predict upfront than flat per-seat or per-instance pricing
Full enterprise features and advanced multi-region capabilities are gated behind paid Professional-tier pricing
Teams need to evaluate YCQL versus YSQL carefully, since API choice affects tooling and ecosystem compatibility
Use Cases
Choose TiDB Cloud: Teams on a MySQL-compatible stack who want unified transactional, analytical, and vector search (HTAP) in one engine, with a genuinely free Starter tier (25GiB row + 25GiB column storage, 250M Request Units/month) before pay-as-you-go charges apply.
Choose YugabyteDB: Teams migrating existing PostgreSQL applications who need multi-region high availability and disaster recovery built in, and are comfortable with vCPU-based managed pricing starting at $125/vCPU/month, or running the open-source version themselves for free.
Need both: An organization running separate MySQL-based and PostgreSQL-based application teams evaluating a move to distributed SQL would likely pilot both — TiDB Cloud for MySQL-compatible workloads and YugabyteDB for PostgreSQL-compatible ones — rather than force one engine's dialect onto the other team.
TiDB Cloud
Scaling beyond single-node MySQL — High-growth applications outgrowing a single MySQL instance can scale horizontally without a full rewrite.
Real-time analytics on live data — Teams needing analytical queries against current transactional data without a separate data warehouse pipeline.
AI and agentic applications — Applications combining transactional storage with vector search for retrieval-augmented generation and agent workloads.
YugabyteDB
Scaling beyond single-node PostgreSQL — Engineering teams whose application has outgrown a single-node PostgreSQL database migrate to YugabyteDB for built-in horizontal scaling.
Multi-region, mission-critical applications — Businesses running applications that must survive a full region outage deploy YugabyteDB across multiple regions for resilience.
Data residency and compliance-driven deployments — Organizations subject to data residency regulations use YugabyteDB Aeon's bring-your-own-cloud option to keep data in specific jurisdictions.
Frequently Asked Questions
Is TiDB Cloud free to start?
Yes, the Starter plan includes a free monthly allowance of storage and Request Units before pay-as-you-go charges apply.
Is YugabyteDB open source?
Yes, the open-source version is free to download and self-host.
Which is MySQL-compatible and which is PostgreSQL-compatible?
TiDB Cloud uses MySQL-compatible SQL; YugabyteDB is PostgreSQL-compatible.
Does either support vector search?
Yes — TiDB Cloud has native vector search integrated into its HTAP engine, and YugabyteDB offers vector indexing for RAG and GenAI applications.
How much does YugabyteDB Aeon cost?
The Standard plan starts at $125/vCPU/month and Professional at $167/vCPU/month; Enterprise pricing is custom.
When were these companies founded?
TiDB Cloud's underlying database was founded in 2015; YugabyteDB was founded in 2016.