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Databases · head to head

QuestDB vs Segment

QuestDB logo

QuestDB

Databases

Fast open source time-series database for high throughput ingestion

From
Free
Rated
-
Full reviewWebsite
Segment logo

Segment

Technology

Customer data platform that unifies your data

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: QuestDB open-source edition lacks high-availability, distributed architecture, and enterprise security features; Segment pricing is not transparent; requires sales contact for quotes
  • They diverge on capability: QuestDB covers High Throughput Ingestion, Segment covers Data collection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which QuestDB and Segment actually diverge.

Attributes where QuestDB and Segment differ
AttributeQuestDBSegment
Pricing modelopen-sourceUnknown
PlatformsDocker, Kubernetes, Cloud (AWS, Azure, GCP)Web, API
CategoryDatabasesTechnology
Founded20142011

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 QuestDB

  • High Throughput Ingestion
  • SQL Support
  • Time-series Optimization
  • SIMD Vectorization
  • Column-oriented Storage
  • Built-in Web Console
  • InfluxDB Line Protocol
  • PostgreSQL

Only in Segment

  • Data collection
  • Data routing
  • Data warehouse
  • Identity resolution
  • Protocols
  • Privacy portal
  • Functions
  • Replay

What people use each for

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

QuestDB

  • Time-series analytics ingesting up to 20M rows/second from IoT sensors or financial data feedsnot Segment
  • Real-time dashboarding with 32ms time-to-first-row latency for minute-level analyticsnot Segment
  • Applications requiring multi-tier storage (hot ingest, real-time SQL, cold Parquet archive)not Segment

Segment

  • Customer data unificationnot QuestDB
  • Marketing attributionnot QuestDB
  • Product analyticsnot QuestDB
  • Data governancenot QuestDB
  • Personalizationnot QuestDB

Where each one falls short

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

QuestDB

  • Open-source edition lacks high-availability, distributed architecture, and enterprise security features
  • Enterprise edition pricing not published; requires contacting sales for custom quote
  • Ingestion limit of 20M rows/sec platform-dependent; may not scale to extreme throughput requirements

Segment

  • Pricing is not transparent; requires sales contact for quotes
  • No lower-tier option for small businesses without contacting sales
  • Custom pricing can be expensive for mid-market companies
  • Now owned by Twilio, which affects long-term independence and focus

Pricing, plan by plan

QuestDB

Free

No published plan breakdown. See the QuestDB review.

Segment

Free

No published plan breakdown. See the Segment review.

Which should you pick?

Choose QuestDB if

  • You need high throughput ingestion.
  • You want to start without paying.
  • You work on Docker, Kubernetes, Cloud (AWS, Azure, GCP).
  • You also want sql support.
QuestDB review

Choose Segment if

  • You need data collection.
  • You want to start without paying.
  • You work on Web, API.
  • You also want data routing.
Segment review

Questions people ask

Is QuestDB or Segment better?
Neither clearly leads. QuestDB starts at Free and Segment at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, QuestDB or Segment?
QuestDB starts at Free and Segment at Free.
Does QuestDB or Segment run on more platforms?
QuestDB runs on Docker, Kubernetes, Cloud (AWS, Azure, GCP). Segment runs on Web, API.
Can I use QuestDB for free?
Both have a free tier, so you can try either at no cost before committing.
What is QuestDB best used for?
QuestDB is most often used for time-series analytics ingesting up to 20m rows/second from iot sensors or financial data feeds, real-time dashboarding with 32ms time-to-first-row latency for minute-level analytics, applications requiring multi-tier storage (hot ingest, real-time sql, cold parquet archive). Of those, time-series analytics ingesting up to 20m rows/second from iot sensors or financial data feeds and real-time dashboarding with 32ms time-to-first-row latency for minute-level analytics are not what Segment is typically brought in for.
What can QuestDB do that Segment cannot?
QuestDB covers High Throughput Ingestion, SQL Support, Time-series Optimization, SIMD Vectorization. Segment covers Data collection, Data routing, Data warehouse, Identity resolution.

Answered from the vendors’ own pages

QuestDB: How much does QuestDB Enterprise cost?

QuestDB does not publish specific pricing for the Enterprise tier. Customers must contact QuestDB via their enterprise contact form to receive a custom quote.

Source
Segment: Does Segment have a free plan?

Segment uses a freemium model with 10K users included free. Additional users require paid plans based on monthly active users (MTUs), calculated as monthly active users plus anonymous visitors per month.

Source
QuestDB: Does QuestDB offer a free version?

Yes, QuestDB Open Source is completely free and recommended for evaluation, prototyping, and pilot projects. Enterprise features, high availability, security, and dedicated support require the paid Enterprise tier.

Source
Segment: What is Segment's pricing based on?

Segment pricing is based on monthly active users (MTU), which equals your monthly active users plus anonymous visitors. Pricing is customized; contact sales for specific quotes.

Source
QuestDB: What deployment options does QuestDB offer?

QuestDB offers open source deployment, Enterprise deployment, and Bring Your Own Cloud (BYOC) deployment. Pricing details for BYOC and Enterprise tiers are not published and require direct contact with sales.

Source
Segment: What is the difference between Customer Data Pipeline and Customer Data Platform?

Pipeline (Business) focuses on data collection and delivery to 700+ destinations. CDP includes Pipeline plus Unify for unified profiles and Engage for audience orchestration with AI capabilities.

Source
Segment: How many integrations does Segment have?

Segment connects to over 700 destinations, allowing data to be sent to analytics platforms, data warehouses, CRMs, and other business tools.

Source
Segment: Does Segment have SSO and HIPAA compliance?

Yes. Both Pipeline and CDP tiers offer multi-factor authentication, single sign-on (SSO), and HIPAA eligibility for healthcare organizations.

Source
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