All in all, it is good to have more competitions with around S$30 (effective pricing) plans from the ISPs.
I will usually recommend Starhub and M1 if you read the first page of the Singapore ISP comparison thread. But I understand people may have good reasons to go with other plans.
1) Starhub 5Gbps offer at S$29.55 per month. Nokia XS-2426X-A ONR (AX6000 wireless) option with one extra free Nokia Beacon 2. Very good value for average users who do not want to pay anything extra on routers.
2) Starhub 5Gbps offer at S$29.55, ONT option without router. Very good value for those who do not want to use ONR but their own router.
3) M1 6Gbps offer with two-pack of ZenWiFi BT10 at S$59.90 per month. If you value the two-pack of BT10 at about S$720 or more, then the effective price is at S$29.90 for 6Gbps no-frills plan. Some users are able to sell the two units at about S$800 to lower the effective price at S$26.57 per month.
4) Singtel 3Gbps plan at S$29.90 per month for selected new customers only (Singtel mobile customers who want to switch to Singtel for Fibre Internet)
5) SIMBA 10Gbps plan at S$29.99 per 30 days.
6) WC 2.5Gbps plan at S$24 per month (very good for recontract users). New users need to pay NLT charge of S$61.04 and installation charge of S$54.50 and the effective price of S$28.81 per month.
7) WC 10Gbps plan at S$28.99 per month (very good for recontract users). New users need to pay installation charge of S$54.50 and the effective price of S$31.26 per month.
8) VQ limited time promotion of 3Gbps plan at S$29.98 per month (no frills plan).
Then we have legacy M1 500Mbps and Starhub 500Mbps plan at about S$30.45 per month for those users who stick to the two plans (no need to recontract to continue the same pricing).
Update on 22 Jan 2025.
1) Starhub 5Gbps special offers
S$29.55 per month with ONT got no router.
S$30.37 per month with ONT got free TP-Link EX510.
S$29.55 per month with ONR got the ONR plus one Nokia Beacon 2.
S$30.37 per month with ONR got the ONR plus two Nokia Beacon 2.
S$29.55 per month offer is technically for new users. Existing users need to sign up as new user and cancel the old plan upon installation of the new 5Gbps plan.
S$30.37 per month offer seems to be for recontract (may need to negotiate with Starhub to get this offer).
2)
Superb M1 6Gbps recontract offer --> S$15 OFF for M1 6Gbps (probably limited time offer)
S$32.90 per month with free TP-Link Archer BE805 (roughly S$360 BNIB at Carousell)
S$44.90 per month with free Asus ZenWiFi BT10 twin-pack (roughly S$800 BNIB at Carousell)
Effective pricing is lower than the above Starhub 5Gbps offer, even if you sell the bundled router cheaper than the market prevailing price to have a quick deal, say S$300 for Archer BE805 or S$720 for BT10 twin-pack.
Effective price to sell Archer BE805 at S$300 --> S$20.40 per month for 6Gbps no-frills plan
Effective price to sell ZenWiFi BT10 twin-pack at S$720 --> S$14.90 per month for 6Gbps no-frills plan.