Ask both providers to price the same workflow over the same period. Include discovery, launch, software, model usage, monitoring, support and changes. Account for your team’s time to explain the process, review outputs and resolve exceptions. A cheaper build can be a good deal if you can operate it; a retainer can be worthwhile if it covers work you repeatedly need.
AmpliLoop starts with a free blueprint, a launch sprint from $3,999 and ongoing service from $4,999 a month. One launch plus six months at those starting rates is $33,993 before third-party licences. Model and API costs are included; tools such as enrichment services are billed separately. This is an illustrative budget, not a quote for every workflow.
There is no useful universal agency price. Request a proposal for your actual brief, then check what triggers a change request, whether support includes workflow improvements and what happens if delivery or review takes longer than expected.