Diamond Energy Plans & Prices — Compare & Save

Diamond Energy offers 205 plans in Australia (205 electricity), based on Consumer Data Right (CDR) data updated daily by Bill Hero.

Retailer tier
Tier 3 retailer
0.2% market share
Complaints
Low
0.26% rate
Customers
11,724
0.2% market share
Founded
2004

Rates sourced from CDR and refreshed daily. Last updated: 15 August 2026.

Bill Hero is an independent, fully automated comparison and switching service: we compare every bill you receive against every plan from every provider, then help you switch whenever you can save. We don't seek or accept commission fees from Diamond Energy or any other provider, which means we work only for you. Find out more.

About Diamond Energy

Diamond Energy is a Melbourne-based independent electricity retailer founded in 2004. It consistently earns 5-star ratings in Greenpeace's Green Electricity Guide and has placed first in CHOICE's Best Electricity Provider rankings. Diamond sources more renewable energy than its customers consume (beyond carbon neutral) and offers accredited GreenPower options via its Diamond Pure Plus plans with competitive solar feed-in tariffs. Its base rates are typically higher than the cheapest market offers. Diamond operates in VIC, NSW, SA, and QLD.

Products offeredEnergy Retailer
Residential customers11,724 (0.2% share)
GreenPower productsYes — accredited
Australian ownershippartial
Market positionMid-sized retailer

Diamond Energy is a mid-sized retailer with 205 plans.

Bill Hero is an independent comparison service: we don't take placement fees from Diamond Energy or any other provider. Rates below are sourced from CDR and refreshed daily.

Compare Diamond Energy plans in your area

Enter your postcode to see Diamond Energy plans available at your address.

You can also compare plans using the free government tool: Energy Made Easy. Bill Hero adds CDR-based exact comparisons, demand-tariff support, and automated bill monitoring.

Customer Reviews

Customer Reviews (0)

Log in to review

No reviews yet. Be the first.

Frequently Asked Questions

How many plans does Diamond Energy offer?▾
Diamond Energy offers 205 plans in Australia (205 electricity, 0 gas), based on Consumer Data Right (CDR) data updated daily by Bill Hero.
Does Diamond Energy offer both electricity and gas?▾
Diamond Energy currently offers electricity only — 205 plans are listed in CDR data. Bill Hero does not have any gas plans on file from this retailer.
What is the cheapest Diamond Energy electricity plan?▾
Diamond Everyday - Time of Use is the cheapest Diamond Energy residential electricity plan in Bill Hero's comparison, with an estimated annual cost of $1,248 at 4,000 kWh/year. Your actual cost depends on your usage and tariff — see the table above for the full list.
Is Diamond Energy a major or smaller retailer?▾
Diamond Energy is a mid-sized retailer in Bill Hero's comparison, with 205 plans on offer. Larger retailers typically have 1,000+ plans; Diamond Energy sits between major incumbents and smaller specialists.
How often is Diamond Energy's plan data updated?▾
Bill Hero refreshes Diamond Energy's plan data daily from the Consumer Data Right (CDR) energy API. Pricing on this page reflects the latest published rates from Diamond Energy.

Never overpay for power again

Bill Hero compares all providers to find you the cheapest plan for your actual usage — every bill, automatically.

Subscribe to Bill Hero