amaysim vs Optus: which is cheaper?

The short version

The widest gap is at 10GB a month: amaysim is $269 cheaper than Optus over the first year.
Cheapest way in: amaysim 240GB 365-day at $199 for the first year, or Optus Small at $468 for the first year.
Best value per GB: Optus Promo, about $0.19 a GB over the first year.
amaysim sells 7 plans: prepaid, billed every 28 days and every 365 days.
Optus sells 4 plans: postpaid, billed monthly.

Worth knowing

Price cliff: 1 of amaysim's 7 plans costs more in year two. amaysim 240GB 365-day goes from $199 to $320.
Deal ending soon: 2 deals end, the first on 19 October 2026.
2 plans (amaysim 240GB 365-day at $320 and amaysim 350GB 365-day at $350) are paid once a year, so the first bill is large.
7 of amaysim's 7 plans carry a note that a detail wasn't stated or couldn't be read (for example what happens when data runs out), so check the provider's page before you buy.
Price cliff: 2 of Optus's 4 plans cost more in year two. Optus Small goes from $468 to $720.
Deal ending soon: Optus Small's deal ends on 12 November 2026.
When data runs out: with amaysim data stops until the next recharge or month; with Optus speed drops when data runs out.

Cheapest plan on each provider at each data level
You use	amaysim	Optus
10GB a month	240GB 365-day$199 first year · $519 over twoCheaper	Small$468 first year · $1,188 over two
30GB a month	42GB 28-day$421 first year · $876 over twoCheaper	Small$468 first year · $1,188 over two
60GB a month	80GB 28-day$560 first year · $1,080 over two	Small$468 first year · $1,188 over twoCheaper
100GB a month	95GB 28-day$630 first year · $1,215 over twoCheaper	Promo$828 first year · $1,776 over two
200GB a month	No plan with this much data	Promo$828 first year · $1,776 over twoOnly one

Compare with your own data

Network

amaysim: uses the optus network. Optus: runs its own network. Both use the same Optus towers, so coverage is the same; the differences are price, data and extras. Check coverage where you live and work: amaysim map · Optus map.

amaysim vs Optus

The short version

Worth knowing

Network

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