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Software · head to head

SurrealDB vs MotherDuck

SurrealDB logo

SurrealDB

Software

Multi-model database combining documents, graphs, vectors and time-series

From
Free
Rated
-
Full reviewWebsite
MotherDuck logo

MotherDuck

Software

Serverless analytics data warehouse built on DuckDB

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: SurrealDB the listed $0.192/node/hr Scale pricing lacks transparent higher-tier rates, requiring a sales conversation for full production sizing.; MotherDuck the free Lite plan caps compute at 10 hours per month, which limits it to light or hobbyist workloads.
  • They diverge on capability: SurrealDB covers Multi-model engine, MotherDuck covers Serverless DuckDB instances.

Where they differ

Only the attributes on which SurrealDB and MotherDuck actually diverge.

Attributes where SurrealDB and MotherDuck differ
AttributeSurrealDBMotherDuck
Platformsweb, api, windows, mac, linuxweb, api

Identical on both: starting price (Free), pricing model (usage-based), free tier (Yes), user rating (Not yet rated), category (Unknown), founded (2022).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in SurrealDB

  • Multi-model engine
  • ACID transactions
  • Hybrid retrieval
  • Horizontal scaling
  • Multi-region disaster recovery
  • FIPS-compliant cryptography

Only in MotherDuck

  • Serverless DuckDB instances
  • Cloud storage querying
  • MCP server
  • Dives
  • Flights
  • Read-scaling replicas

What people use each for

The jobs each tool is most often brought in to do.

SurrealDB

  • AI agent memory and retrieval-augmented generationnot MotherDuck
  • Applications needing documents, graphs and vectors in one databasenot MotherDuck
  • Knowledge graph construction from unstructured datanot MotherDuck
  • Regulated workloads requiring SOC2/ISO27001/HIPAA-eligible hostingnot MotherDuck

MotherDuck

  • Ad-hoc analytics on gigabyte-to-terabyte datasetsnot SurrealDB
  • Querying data lake files in S3/GCS/Azure without ingestionnot SurrealDB
  • AI agent data analysis via MCPnot SurrealDB
  • Scheduled data pipeline transformationsnot SurrealDB

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

SurrealDB

  • The listed $0.192/node/hr Scale pricing lacks transparent higher-tier rates, requiring a sales conversation for full production sizing.
  • As a newer multi-model database, it has a smaller ecosystem of drivers, ORMs and community tooling than established single-model databases.
  • HIPAA compliance is only available as an Enterprise add-on rather than included in standard paid tiers.
  • Combining multiple data models in one engine can add query-planning complexity compared to purpose-built single-model databases.

MotherDuck

  • The free Lite plan caps compute at 10 hours per month, which limits it to light or hobbyist workloads.
  • Business plan usage charges on top of the $250/month base can make costs less predictable than flat-rate competitors.
  • There are no academic or non-profit discounts, unlike some competing data platforms.
  • Annual billing requires going through a sales conversation rather than a self-serve toggle.

Pricing, plan by plan

SurrealDB

Free
  • StartFree
    • 1 free instance, then from $0.021/hr
    • 1GB storage free forever
    • Vertical scaling to terabytes
  • Scale$0.192/month
    • $0.192/node/hr
    • Production-grade fault tolerance
    • Horizontal scaling to petabytes
  • Enterprise$undefined/month
    • Self-hosted, custom pricing
    • Clustered fault-tolerant deployments
    • FIPS-compliant cryptography

MotherDuck

Free
  • LiteFree
    • Up to 3 internal active users
    • 2 service accounts
    • 10GB free storage
  • Business$250/month
    • Up to 10 internal active users
    • Unlimited service accounts
    • 5 instance types with read-scaling replicas
  • Enterprise$undefined/month
    • Unlimited internal users and service accounts
    • Fixed-cost capacity pricing
    • AWS PrivateLink, IP allowlisting

Which should you pick?

Choose SurrealDB if

  • You need multi-model engine.
  • You want to start without paying.
  • You work on web, api, windows, mac, linux.
  • You also want acid transactions.
SurrealDB review

Choose MotherDuck if

  • You need serverless duckdb instances.
  • You want to start without paying.
  • You work on web, api.
  • You also want cloud storage querying.
MotherDuck review

Questions people ask

Is SurrealDB or MotherDuck better?
Neither clearly leads. SurrealDB starts at Free and MotherDuck at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SurrealDB or MotherDuck?
SurrealDB starts at Free and MotherDuck at Free.
Does SurrealDB or MotherDuck run on more platforms?
SurrealDB runs on web, api, windows, mac, linux. MotherDuck runs on web, api.
Can I use SurrealDB for free?
Both have a free tier, so you can try either at no cost before committing.
What is SurrealDB best used for?
SurrealDB is most often used for ai agent memory and retrieval-augmented generation, applications needing documents, graphs and vectors in one database, knowledge graph construction from unstructured data, regulated workloads requiring soc2/iso27001/hipaa-eligible hosting. Of those, ai agent memory and retrieval-augmented generation and applications needing documents, graphs and vectors in one database are not what MotherDuck is typically brought in for.
What can SurrealDB do that MotherDuck cannot?
SurrealDB covers Multi-model engine, ACID transactions, Hybrid retrieval, Horizontal scaling. MotherDuck covers Serverless DuckDB instances, Cloud storage querying, MCP server, Dives.

Answered from the vendors’ own pages

SurrealDB: What does SurrealDB cost?

SurrealDB Cloud's Start plan is free with one free instance (then from $0.021/hr), the Scale plan runs $0.192/node/hr for production workloads, and Enterprise self-hosted deployments use custom pricing.

Source
MotherDuck: What does MotherDuck cost?

The Lite plan is free (up to 3 users, 10GB storage, 10 hours of Pulse compute/month). Business is $250/organization/month plus usage, with Enterprise available at custom fixed-cost pricing.

Source
SurrealDB: Is there a free plan and what are its limits?

Yes, the Start plan includes one free instance with 1GB of storage free forever and 1GB of outbound data transfer per month, aimed at prototypes and development.

Source
MotherDuck: Is there a free plan and what are its limits?

Yes, the Lite plan is free for up to 3 internal active users and 2 service accounts, with 10GB of storage and 10 hours of Pulse compute per month.

Source
SurrealDB: How is billing handled?

Customers are invoiced monthly based on actual usage in a pay-as-you-go model with no long-term commitments, though commitment-based discounts are available.

Source
MotherDuck: How is usage metered?

Compute instances (Pulse, Standard, Jumbo, Mega, Giga) are billed per second at hourly rates from $0.60 to $24.00/hour, storage is $0.04/GB-month, and AI Functions cost $1.00 per AI Unit.

Source
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