Budget-conscious independent courier company: Speedy is worth evaluating if you need booking, dispatch, customer portals, POD and invoicing at a £30/month starting price, and your drivers can use Android.
Established courier fleet needing iPhone and Android driver apps: Zoom is worth comparing, particularly if its usage-based job bands fit your volumes.
UK operator needing supplier self-billing, exchange integrations or warehouse options: Journease Professional is a relevant candidate, though its per-user price and add-ons need to be included in your calculation.
Operator needing extensive configuration or advanced integration: OnTime 360 offers multiple tiers; check which features require Team or Business rather than assuming the Core plan includes everything.