OCTA+ or Mega: which electricity supplier should you choose?

OCTA+ or Mega: two Belgian suppliers, two independent players, and a face-off that comes up often among households looking to leave an incumbent supplier without making a mistake. On paper, their lowest prices are almost identical. In practice, they do not target the same profile. Here is what really sets them apart, and our verdict depending on your situation. For the full market picture, see our ranking of the best electricity suppliers.

OCTA+ or Mega: which is cheaper?

On their entry-level offer it is a near dead heat — a symbolic edge to OCTA+. Comparing readings taken on 2 August 2026 for a typical household consuming 3,500 kWh a year in Namur, OCTA+'s cheapest electricity offer comes out at 12.20 c€/kWh, or roughly €1,316 a year, against 12.91 c€/kWh and about €1,319 a year with Mega. Three euros apart over twelve months: the price of a coffee. In other words, if headline price is your only criterion, neither one will make you regret the other.

A word of caution on the figures, because this is the trap we see most often: depending on the comparison site, the same Mega contract can be quoted at €1,319 a year or at €1,027. The difference is not an error but the basket used — some estimates include grid fees, taxes and VAT, others do not, and your municipality changes the distribution tariff. Always compare two offers within the same simulation, never across two different articles. For reference, the CREG put the energy component at between €0.106 and €0.171 per kWh in mid-2026, for an all-in price of around €0.30 per kWh including VAT.

What difference does green electricity make to the comparison?

It flips the ranking, and clearly so. Every electricity offer currently marketed by Mega is declared to be of renewable origin: green is included by default, at no extra cost. OCTA+, by contrast, sells both green and conventional plans, and its cheapest green offer climbs to 14.16 c€/kWh, or around €1,449 a year. In concrete terms, as soon as you want green electricity, the gap goes from €3 to roughly €130 a year in Mega's favour.

Be careful, though, not to confuse a "green offer" with genuinely Belgian renewable energy. Both suppliers rely heavily on guarantees of origin, a mechanism that greens electricity on paper. Greenpeace, whose ranking is the Belgian benchmark, spares neither of them: 5/20 for Mega, 4/20 for OCTA+. If environmental impact is your real priority, players such as Ecopower, Cociter or Bolt are far more credible than this pair.

Do OCTA+ and Mega offer the same types of contract?

Yes on the essentials, no on the scope. Both cover the classic Belgian range: variable-price contracts, indexed quarterly or monthly, and fixed-price contracts over one or three years. With either supplier, variable is generally cheaper at sign-up, while fixed costs a little more in exchange for peace of mind — a trade-off we set out in our article on the fixed rate.

The difference lies elsewhere: OCTA+ is a multi-energy supplier. Beyond electricity and gas, it also sells heating oil and fuel, with fuel cards. For a household still heating with oil and driving a lot, bundling everything with a single Belgian contact has real practical value. Mega sticks to electricity and gas, with a shorter but clearer range.

Which has the better customer service?

OCTA+, if you go by the regulator's assessment. The Flemish regulator publishes an annual customer service quality score for suppliers: in the latest ranking, OCTA+ scores 5/5 and Mega 3/5. It is the sharpest gap in this whole comparison, and it weighs heavily the day a settlement invoice goes wrong.

Consumer reviews tell a less flattering story for both. Cross-checking three platforms (Google, Trustpilot, Selectra), OCTA+ shows an average of 2.1/5 across 296 reviews and Mega 2.2/5 across 3,557. Two remarks are in order. First, these scores are structurally low across the energy sector: people rarely leave a review to say their bill arrived on time. Second, volume matters: 3,557 reviews for Mega is a far more solid signal than 296 for the smaller OCTA+. The regulator's score, by contrast, rests on objective criteria (processing times, complaints, billing) and deserves more weight.

What really sets OCTA+ apart from Mega?

Their model, not their electricity — which arrives over the same grid whatever the supplier. Mega is an energy pure player based in Liège, claiming more than 300,000 customers and playing the card of low prices, green as standard and simple online management. It is a player that regularly tops price comparison sites.

OCTA+ presents itself as the only 100% Belgian energy supplier and the largest independent player on the market, with the identity of a multi-energy distributor rather than a price challenger. Its strength is not undercutting the market — on green power it is actually more expensive — but being a single Belgian counter with a good customer relations record. Two different strategies answering two different expectations.

OCTA+ or Mega: which should you choose for your profile?

It depends on what you put first: the price of green power, the customer relationship or bundling. Here is our reading, profile by profile.

How do you switch from one supplier to the other?

It is free, with no cut-off, and the new supplier handles everything. Get hold of a recent bill — it carries your EAN code (18 digits) and your annual consumption — then sign up online with OCTA+ or Mega. The new supplier notifies the old one and organises the switch. Your distribution system operator (ORES, Fluvius, RESA or Sibelga depending on your municipality) does not change: electricity keeps arriving exactly as before.

On timing, household contracts can be cancelled at any time with one month's notice and no break-up fees. Our advice: do not switch in a hurry. First simulate your specific case on the official comparison tool of the CREG, VREG, CWaPE or Brugel depending on your region, then set the result against the whole market in our ranking of electricity suppliers. On a three-euro annual gap, it is green power, service and scope that should decide — not price.