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Telecommunications · head to head

Five9 vs Postgres

Five9 logo

Five9

Telecommunications

Intelligent cloud contact center

From
$149/month
Rated
-
Full reviewWebsite
Postgres logo

Postgres

Technology

The world's most advanced open source database

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Postgres has a free tier, so it costs nothing to try first.
  • Each has a real cost: Five9 a 50 seat minimum applies to the published rates, so the entry cost on the $119 Digital plan is $5,950 a month; Postgres each major version is supported for only 5 years after its initial release, after which it is end-of-life
  • They diverge on capability: Five9 covers Intelligent routing, Postgres covers ACID compliance.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Five9 and Postgres actually diverge.

Attributes where Five9 and Postgres differ
AttributeFive9Postgres
Starting price$149/monthFree
Pricing modelsubscriptionopen-source
Free tierNoYes
PlatformsWeb, DesktopLinux, Windows, Macos, Docker
CategoryTelecommunicationsTechnology
Founded20011996

Identical on both: 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 Five9

  • Intelligent routing
  • IVR
  • ACD
  • Dialer
  • WFM
  • Quality management
  • Analytics
  • Salesforce

Only in Postgres

  • ACID compliance
  • Complex queries
  • Foreign keys
  • Triggers
  • Views
  • Stored procedures
  • JSON/JSONB support
  • Full-text search

What people use each for

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

Five9

  • Cloud contact centre across voice, chat, email and social messagingnot Postgres
  • Routing and managing high volume customer interactionsnot Postgres

Postgres

  • Running a general purpose relational database for applicationsnot Five9
  • Self-hosting an open source SQL database with no licence feenot Five9
  • Workloads needing extensions, JSON and full text search in one enginenot Five9

Where each one falls short

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

Five9

  • A 50 seat minimum applies to the published rates, so the entry cost on the $119 Digital plan is $5,950 a month
  • Prices are per concurrent user rather than per named agent, which changes what a seat means when shifts overlap
  • Voice is excluded from the Digital plan and requires a quote
  • Usage based charges apply on top of the per seat rate
  • Three of the five tiers publish no price at all

Postgres

  • Each major version is supported for only 5 years after its initial release, after which it is end-of-life
  • Major version upgrades break on-disk compatibility and require a full dump and reload or the pg_upgrade tool
  • New major versions ship about once a year, so staying supported means a disruptive upgrade cycle
  • Minor releases contain only frequently-encountered bug fixes, low-risk fixes, security issues and data corruption fixes, so feature gaps are not addressed within a major version
  • There is no vendor SLA; commercial support must be bought separately from third party professional services listed by the project

Pricing, plan by plan

Five9

$149/month
  • Core$149/month
    • Inbound/outbound
    • IVR
    • Basic CTI
  • Premium$169/month
    • Core + Chat/email
    • Quality management
  • Optimum$199/month
    • Premium + WFM
    • Proactive chat
  • Ultimate$229/month
    • Full suite
    • Advanced analytics

Postgres

Free
  • Community EditionFree
    • Full database features
    • No limitations
    • Community support

Which should you pick?

Choose Five9 if

  • You need intelligent routing.
  • You work on Web, Desktop.
  • You also want ivr.
Five9 review

Choose Postgres if

  • You need acid compliance.
  • You want to start without paying.
  • You work on Linux, Windows, Macos, Docker.
  • You also want complex queries.
Postgres review

Questions people ask

Is Five9 or Postgres better?
Neither clearly leads. Five9 starts at $149/month and Postgres at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Five9 or Postgres?
Postgres has a free tier; the other does not. Paid plans start at $149/month for Five9 and Free for Postgres.
Does Five9 or Postgres run on more platforms?
Five9 runs on Web, Desktop. Postgres runs on Linux, Windows, Macos, Docker.
Can I use Postgres for free?
Yes. Postgres has a free tier, so you can try it without paying. Five9 starts at $149/month.
What is Five9 best used for?
Five9 is most often used for cloud contact centre across voice, chat, email and social messaging, routing and managing high volume customer interactions. Of those, cloud contact centre across voice, chat, email and social messaging and routing and managing high volume customer interactions are not what Postgres is typically brought in for.
What can Five9 do that Postgres cannot?
Five9 covers Intelligent routing, IVR, ACD, Dialer. Postgres covers ACID compliance, Complex queries, Foreign keys, Triggers.

Answered from the vendors’ own pages

Five9: What is the minimum team size required to use Five9?

Five9 requires a minimum commitment of 50 seats for any subscription plan.

Source
Postgres: How much does PostgreSQL cost to use?

PostgreSQL is completely free to download, install, and use. No licensing fees, subscription costs, or per-seat charges apply. The database is open source under the PostgreSQL License. Source: https://www.postgresql.org

Source
Five9: How is Five9 pricing calculated, per user, flat rate, or usage-based?

Five9 offers flexible pricing models: per concurrent user, per named agent, or pay-per-use. The pricing structure varies depending on the chosen bundle.

Source
Postgres: Are there commercial PostgreSQL support options available?

Official PostgreSQL (the project) is free. Commercial PostgreSQL services such as hosting, professional support, training, and managed database services are offered by third-party vendors, not the PostgreSQL project itself. Source: https://www.postgresql.org

Source
Five9: What does the entry-level Digital bundle include, and what does it cost?

The Digital bundle costs $119 per month per seat and supports digital channels only. Higher tiers (Core at $159, Plus, Pro, and Enterprise) are available, with Plus/Pro/Enterprise requiring contact with sales for pricing.

Source
Postgres: Do I need a license to use PostgreSQL commercially?

No. PostgreSQL is open source under the PostgreSQL License, which permits free commercial use without royalties, licensing fees, or support obligations. Source: https://www.postgresql.org

Source
Five9: Are there additional charges beyond the base subscription?

Yes. All bundles include 3000 AI minutes per seat, but additional AI usage incurs charges. SMS messaging also has usage-based charges applied separately.

Source
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