Mainstay vs. Deltek Vantagepoint
Deltek runs your business. Mainstay proves your deliveries. Different problems.
If a lead agency disputed receipt of your CEQA report, Deltek cannot help you. That is not a criticism — it was never designed to. Mainstay was.
The question that changes the conversation
“If a lead agency said your RWQCB report wasn't received on time — what does Deltek give you?”
Let the silence work. Then show them the SHA-256 receipt.
Three rows. Each one verifiable.
Every dimension below is a question a principal can answer tonight with their current vendor.
Different layers of the same stack.
Deltek Vantagepoint sits at Layer 3: Project / Business Management. Deltek tracks everything before and after the delivery event. It does not know the delivery event happened — and has no legal proof it did.
Deltek manages your projects up until the moment you deliver. Mainstay manages the moment your work legally changes hands — and creates the SHA-256 proof that it did. Deltek never knew that moment happened. Now it does.
Deltek closes the project when the invoice is paid. Mainstay closes the delivery loop the moment the report is confirmed received — and fires the billing trigger with a QuickBooks-ready export the same day.
Deltek, Unanet, BQE — project accounting, time/expense, CRM
EVX, EnviroCommand (partially) — data management, sampling, monitoring records
SHA-256 tamper-evident receipts · QuickBooks invoice trigger · Chain of custody
Why most firms run both
Most Mainstay founding cohort firms already run Deltek for project accounting. The two integrate at the delivery event without any data migration.
When a client asks “how does this compare to Deltek Vantagepoint?”
- 1
Deltek is a project ERP — it handles project accounting, time, and expense. Mainstay is a delivery layer. Different problems.
- 2
If a lead agency said your report wasn't received on time — what does Deltek give you?
- 3
Mainstay gives you a SHA-256 receipt the moment it's confirmed received, and fires your billing trigger with a QuickBooks-ready invoice export. Deltek doesn't touch either of those — which is why most of our clients run both.
See the SHA-256 receipt for yourself.
45-minute session. Real project. Real receipt in your inbox before the call ends.