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Databases · head to head

Apache Solr vs EnergyCAP

Apache Solr logo

Apache Solr

Databases

Enterprise search platform built on Apache Lucene

From
Free
Rated
-
Full reviewWebsite
EnergyCAP logo

EnergyCAP

Energy

Utility bill and energy management software

From
$1000/month
Rated
-
Full reviewWebsite

The short version

  • Only Apache Solr has a free tier, so it costs nothing to try first.
  • Each has a real cost: Apache Solr xML-heavy configuration and a developer experience that feels dated beside newer engines; EnergyCAP priced per meter per year, so cost scales with how many utility connection points exist rather than with users or sites
  • They diverge on capability: Apache Solr covers Lucene-based indexing, EnergyCAP covers Utility bill management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Apache Solr and EnergyCAP actually diverge.

Attributes where Apache Solr and EnergyCAP differ
AttributeApache SolrEnergyCAP
Starting priceFree$1000/month
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsLinux, Docker, Kubernetes, Self-hostedWeb, Api
CategoryDatabasesEnergy
FoundedUnknown1980

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 Apache Solr

  • Lucene-based indexing
  • Faceted search
  • SolrCloud
  • Schema control

Only in EnergyCAP

  • Utility bill management
  • Energy accounting
  • Cost allocation
  • Sustainability reporting
  • Weather normalization
  • Rate analysis
  • Budgeting
  • Benchmarking

What people use each for

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

Apache Solr

  • Library, archive and catalogue search where faceting is centralnot EnergyCAP
  • Long-lived enterprise deployments valuing stability over noveltynot EnergyCAP
  • Search requiring precise, explicitly configured relevance tuningnot EnergyCAP

EnergyCAP

  • Tracking utility bills and energy consumption across a property portfolionot Apache Solr
  • Reporting on energy spend and emissions for an organisationnot Apache Solr

Where each one falls short

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

Apache Solr

  • XML-heavy configuration and a developer experience that feels dated beside newer engines
  • SolrCloud depends on ZooKeeper, adding a component Elasticsearch removed years ago
  • Smaller mindshare now, so newer tutorials, hiring and integrations favour Elasticsearch
  • Considerably heavier than a purpose-built application search engine

EnergyCAP

  • Priced per meter per year, so cost scales with how many utility connection points exist rather than with users or sites
  • No figure is published at any level, and every package is quoted by sales
  • Emissions, interval data, bill capture and bill pay are separately priced add ons rather than part of the core platform

Pricing, plan by plan

Apache Solr

Free
  • Apache SolrFree
    • Full functionality
    • No usage limits
    • Community support

EnergyCAP

$1000/month
  • Essential$1000/month
    • Utility bill management
    • Energy tracking
    • Basic reporting
  • Professional$2500/month
    • Advanced analytics
    • Sustainability reporting
    • Budgeting tools
  • Enterprise$undefined/month
    • Unlimited users
    • Custom integrations
    • API access

Which should you pick?

Choose Apache Solr if

  • You need lucene-based indexing.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Self-hosted.
  • You also want faceted search.
Apache Solr review

Choose EnergyCAP if

  • You need utility bill management.
  • You work on Web, Api.
  • You also want energy accounting.
EnergyCAP review

Questions people ask

Is Apache Solr or EnergyCAP better?
Neither clearly leads. Apache Solr starts at Free and EnergyCAP at $1000/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache Solr or EnergyCAP?
Apache Solr has a free tier; the other does not. Paid plans start at Free for Apache Solr and $1000/month for EnergyCAP.
Does Apache Solr or EnergyCAP run on more platforms?
Apache Solr runs on Linux, Docker, Kubernetes, Self-hosted. EnergyCAP runs on Web, Api.
Can I use Apache Solr for free?
Yes. Apache Solr has a free tier, so you can try it without paying. EnergyCAP starts at $1000/month.
What is Apache Solr best used for?
Apache Solr is most often used for library, archive and catalogue search where faceting is central, long-lived enterprise deployments valuing stability over novelty, search requiring precise, explicitly configured relevance tuning. Of those, library, archive and catalogue search where faceting is central and long-lived enterprise deployments valuing stability over novelty are not what EnergyCAP is typically brought in for.
What can Apache Solr do that EnergyCAP cannot?
Apache Solr covers Lucene-based indexing, Faceted search, SolrCloud, Schema control. EnergyCAP covers Utility bill management, Energy accounting, Cost allocation, Sustainability reporting.

Answered from the vendors’ own pages

Apache Solr: Is Apache Solr free?

Yes, open source under the Apache Software Foundation.

EnergyCAP: What is EnergyCAP's pricing model?

EnergyCAP pricing is based per meter per year. The company allows customers to customize their package by adding premium features such as emissions tracking, interval data analytics, finance modules, bill capture, and bill pay services based on business needs.

Source
Apache Solr: Solr or Elasticsearch?

Both are built on Lucene. Elasticsearch has the larger ecosystem and a friendlier API; Solr is very mature and strong on faceted search, and remains common in library and catalogue systems.

EnergyCAP: How much does EnergyCAP cost?

EnergyCAP does not publish specific pricing amounts. Customers must contact sales for a customized quote based on their meter count and selected features.

Source
Apache Solr: Is Solr still maintained?

Yes, actively, as a top-level Apache project.

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