Weaviate vs MongoDB Atlas Vector Search: Vector Databases Pricing (2026)
Compare / Weaviate vs MongoDB Atlas Vector Search
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Team size
25 seats

Weaviate vs MongoDB Atlas Vector Search

Vector Databases pricing comparison · 2026

Weaviate has a free plan, then $45–$400/mo, while MongoDB Atlas Vector Search is usage-based from $0.011 per hour. MongoDB Atlas Vector Search is typically 87% more affordable, though your actual cost depends on tier and team size.

Visit
See pricing on each vendor's site
Above-the-fold path — each link opens the vendor's pricing page in a new tab.
Visit Weaviate pricing
Free plan limits → Discount programs →
Visit MongoDB pricing
Free plan limits → Discount programs →
Compare
2 products · Vector Databases
Side-by-side · live
Weaviate
Weaviate pricing starts at $45/month for the Flex plan and $400/month for the Premium plan
verified today
View pricing →
MongoDB Atlas Vector Search
MongoDB Atlas Vector Search pricing starts at $0/month on the M0 Free tier, which provides
verified 10w ago
View pricing →
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Usage-based
$0.00465 per 1M dimensions
see vendor pricing for volume tiers
Usage-based
$0.011 per hour
see vendor pricing for volume tiers
What buyers actually pay
median, annual
Vendr deal-flow data. The real benchmark, not list price.
Median annual
$7.3K/yr
Vendr · n=3 · limited data
No Vendr data
—
Not in Vendr's deal flow
REF · 01

Sources & confidence

Every dollar amount and contract clause below traces back to a sourced fact. We don't manufacture composite scores.

Where this data comes from
Vendr · TrustRadius · Reddit · BBB · official docs
Sources 13 sourced facts
9 hidden-cost · 3 contract · Vendr median
Last verified today
Confidence Limited confidence
Sources 11 sourced facts
8 hidden-cost · 2 contract · 1 review platform
Last verified 2mo ago
Confidence Medium confidence
REF · 02

Plans at a glance

Every tier per product. Lock one to drive the cost row above and reveal a tier-specific outbound CTA.

Tier ladder
Click a tier to lock the cost row to it. Locking surfaces a tier-specific Visit CTA.
REF · 03

Hidden costs

Each cost is severity-ranked, with the dollar range quoted from its source (Vendr, Reddit, TrustRadius, BBB, official docs) — never our estimate.

Beyond the sticker
Severity-ranked, sourced
4 documented
  • Multi-Axis Usage Scaling
    10-50% of base license costs
    2 sources
  • Embedding Model Choice Drives Infrastructure Cost
    10-100% of base license costs
    2 sources
  • Scaling Costs with Vector Count and Dimensions
    $369-$3,000
    3 sources
  • Infrastructure Overhead for Self-Hosting
    $50-$200
    2 sources
5 documented
  • Unpredictable Scaling Costs
    5-15% of license costs
    2 sources
  • Dedicated Cluster Cost Cliff
    $600-$700/month
    1 source
  • Developer Support Subscription Continues After Cluster Deletion
    $5/month
    1 source
  • Paid Technical Support Required for Complex Issues
    5-15% of license costs
    2 sources
  • Forced Version Upgrades May Require More Expensive Cluster Tiers
    $56.94/month
    2 sources
REF · 04

Contract terms

The fine print, surfaced. Green = buyer-friendly. Each clause backed by a quoted source.

Weaviate
MongoDB
Auto-renewal
—
Yes
Cancellation
—
—
Commitment
—
—
Price escalation
$369-$3,000
—
Can downgrade
—
—
Based on 5 verified sources (Vendr · TrustRadius · BBB)
REF · 05

What users say

Aggregated, with sample sizes. We use whichever review platform has data.

User reviews
TrustRadius · Trustpilot · G2
No public ratings yet
Best for
Permanent free tier for exploration and prototyping
Watch out
Managed cloud pricing becomes expensive at scale — $3,000/month for 50M high-dimensional vectors
Trustpilot
1.1out of 5 (11)
Best for
Learning and exploring MongoDB in a cloud environment
Watch out
Poor and unresponsive customer support during critical outages, limited to documentation links
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
Visit Weaviate pricing
Free plan limits → Discount programs →
Visit MongoDB pricing
Free plan limits → Discount programs →
License cost is computed from publicly listed plans (real math, list price × seats). Median annual cost is from Vendr's deal flow when available — see source badges. Hidden costs and contract terms each cite their own sources. We do not invent composite scores.
Vector Databases

Weaviate

Free plan; paid $45–$400
/mo
3 plans · Free tier
Full pricing breakdown →
VS
Vector Databases

MongoDB Atlas Vector Search

Free tier; usage-based, from $0.011 per hour
3 plans · Free tier
Full pricing breakdown →

Weaviate and MongoDB Atlas Vector Search are both vector databases competitors. This page compares their list pricing tier by tier so you can see which is cheaper for your workload shape.

Plan-by-Plan Pricing

Plan Weaviate MongoDB Atlas Vector Search
Engram (Free) Free /month Free /hour
Flex $45 /month $8 /hour
Premium $400 /month $56.94 /hour

Cost at Scale

Total cost of ownership — licenses, implementation, and hidden costs included.

Weaviate

5 scenarios
$45/month
Starter: Flex Plan Minimum
$400/month
Growing Team: Premium Plan
$0/month
Prototype / Evaluation (Free Trial)
See all 5 scenarios →

MongoDB Atlas Vector Search

4 scenarios
$0/month
Hobby / Development Project (M0 Free)
$8/month
Small Team (Flex Plan)
starting
$9/month
Small Team (Shared Cluster)
See all 4 scenarios →

Hidden Costs

Beyond the sticker price — what catches buyers off guard.

Weaviate 4 hidden costs

medium
Multi-Axis Usage Scaling 10-50% of base license costs
medium
Embedding Model Choice Drives Infrastructure Cost 10-100% of base license costs
high
Scaling Costs with Vector Count and Dimensions $369-$3,000
medium
Infrastructure Overhead for Self-Hosting $50-$200
See all Weaviate hidden costs →

MongoDB Atlas Vector Search 5 hidden costs

medium
Unpredictable Scaling Costs 5-15% of license costs
high
Dedicated Cluster Cost Cliff
medium
Developer Support Subscription Continues After Cluster Deletion $5/month
high
Paid Technical Support Required for Complex Issues 5-15% of license costs
high
Forced Version Upgrades May Require More Expensive Cluster Tiers $56.94/month
See all MongoDB Atlas Vector Search hidden costs →

Contract Terms

Term Weaviate MongoDB Atlas Vector Search
Auto-renewal — Yes
Cancellation — —
Minimum commitment — —
Price escalation $369-$3,000 —

Continue researching

Weaviate

MongoDB Atlas Vector Search

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