Pay by the hour while a vendor builds your platform from scratch, or start from one that already exists and pay for the customization on top
On ibl.ai you own all the code and the data, run it model-agnostic across any LLM, and pay with no per-seat pricing — so you can deploy anywhere, from your own cloud to a fully air-gapped network.
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A time-and-materials engagement bills for hours worked plus expenses, against a scope that is expected to change. It is the default for AI infrastructure work, and the reason is honest enough: nobody can accurately size a system that has not been designed yet.
That honesty is also the problem. T&M transfers cost risk to the buyer and, as FAR 16.601 puts it plainly, provides the vendor no positive profit incentive for cost control or labor efficiency. The longer the work takes, the more the engagement is worth.
The question worth asking is not which contract model is fairer. It is why the estimate was unreliable in the first place — and the answer, almost always, is that the vendor is building the base from zero on your budget.
Starting from a platform that already exists changes the arithmetic before the contract is written. The uncertain part is no longer the platform; it is the integration with your systems, which is a far smaller and far more estimable surface.
by ibl.ai
Licensed platform, source included, bounded integrationby Systems integrators and AI consultancies
Hourly billing against an open scope| Criteria | Owned Platform + FDE | Time & Materials |
|---|---|---|
| Who Carries Scope Risk | The platform's cost is fixed and already incurred; only the integration is variable, and it is scoped against something that exists. | Carried by the buyer, who absorbs every hour the estimate was wrong by. |
| Is There a Ceiling | Yes — a flat licence plus the compute you choose to run. The ceiling is the price. | Billed as hourly rates per labor category, plus materials, against an open scope, so the total depends on how wrong the estimate turns out to be. |
| Incentive Alignment | Paid the same whether delivery takes six weeks or twelve, so the incentive is to finish. | No structural incentive to finish early — revenue tracks duration. |
| Budget Defensibility | A known line item that survives a budget review and can be forecast years out. | Forecastable only as well as the underlying estimate, which is the thing in question. |
| Criteria | Owned Platform + FDE | Time & Materials |
|---|---|---|
| Reliability of the Estimate | High, because the platform is finished. What remains is integration with known systems. | Low on from-scratch builds — the reason this model is reached for at all. |
| Handling Changed Requirements | Absorbed as engineering, because you hold the source code and can change it directly. | Handled commercially, through re-estimation or change orders. |
| Time to First Production Workload | Weeks — the construction phase does not exist, because the platform already runs. | Quarters, most of them spent building infrastructure that is not specific to you. |
| Depth of Customization Available | Extensive, on top of a working base, with the source in your possession. | Unlimited in principle, which is exactly why it is unbounded in practice. |
| Criteria | Owned Platform + FDE | Time & Materials |
|---|---|---|
| Source Code Ownership | Full source under a perpetual licence, running on your infrastructure. | Determined by contract clauses rather than by the delivery model — commonly whatever was built, usually without the source rights to run it independently. |
| Ability to Operate Independently | Your team runs it; the platform is documented, supported, and maintained beyond any engagement. | Depends on knowledge transfer, which is the step most engagements shorten first. |
| Model Freedom | Model-agnostic by construction — run any LLM and switch without rewriting the platform. | Whatever was built in, and whatever the team is willing to maintain. |
| Deployment Flexibility | Any cloud, on-premise, or fully air-gapped, from the same deployment. | Whatever was engineered; air-gapped operation is significant additional scope. |
When the platform already exists, the unknown shrinks to integration: your systems of record, your identity provider, your data model. That is work an experienced team can scope, because the thing it plugs into is finished.
A T&M engagement is usually pricing the construction of a platform — retrieval, evaluation, guardrails, access control, audit logging, model routing — none of which is specific to your organization, and all of which you are funding.
T&M is not a pricing preference; it is a confession about how much remains unbuilt. Reduce what is unbuilt and the contract model stops mattering so much.
A flat platform licence plus a bounded integration engagement pays the same whether the work takes eight weeks or six. The incentive is to finish.
Hourly billing pays more when the work takes longer. Most integrators are not exploiting that, but no amount of good faith changes the direction the incentive points.
Judge a contract model by what it rewards when nobody is watching. FAR names this explicitly as the reason T&M requires government surveillance.
ibl.ai ships with the full source under a perpetual licence, running on your infrastructure — so the engagement produces an asset you own rather than a dependency you renew.
A T&M engagement produces working software and, frequently, no independent right to operate or modify it. The hours were yours; the platform often is not.
This is the question to settle before the rate card, because it determines whether the spend was capital or rent.
If you can describe the outcome, you should not be funding platform construction to reach it. Start from the built base and scope the integration.
When the deliverable truly cannot be specified — novel research, unproven feasibility — hourly billing against an open scope is the honest structure.
T&M requires a Determination and Findings that no other contract type is suitable. A platform that already exists usually makes a firm-fixed-price or licence structure defensible instead.
A second open-ended engagement rarely estimates better than the first. Changing the starting point changes the estimate; changing the vendor does not.
Timeline: Four to eight weeks for a typical in-flight engagement
Timeline: Days to weeks to contract
ibl.ai is the agentic AI platform where you own all the code and the data. You self-host the entire stack inside your own perimeter, run it model-agnostic across any LLM and switch anytime, and pay by usage with no per-seat pricing — so you can deploy anywhere: your cloud, on-premise, GovCloud, or fully air-gapped.
ibl.ai removes the reason T&M exists. The platform is already built and in production — 1.6M+ users from 400+ organizations — and it ships with the full source code under a perpetual licence, running on your infrastructure. So a customization engagement starts from something that works. Forward-deployed engineers integrate it with your systems of record over APIs and MCP, which is bounded, estimable work rather than open-ended construction. You own all the code and the data, run it model-agnostic across any LLM, with no per-seat pricing — and you can deploy anywhere, from your own cloud to a fully air-gapped network.
Full source code under a perpetual license, running on your infrastructure. Not API access to someone else's platform — the stack itself is yours.
Run any LLM — Claude, GPT, Gemini, Llama, Command, or your own fine-tune — and switch providers without rewriting the platform.
Usage-based billing against a budget cap you set. Cost tracks what your organization actually uses, not how many people you employ.
Your cloud, your VPC, on-premise, GovCloud, or a fully air-gapped network with no outbound connectivity.
1.6M+ users across 400+ organizations run the platform this way, including NVIDIA, MIT, and Syracuse University.
ibl.ai is family-owned and operated from New York, NY — a U.S.-headquartered, domestically-owned long-term partner, not a vendor that sells licenses and moves on.
See how ibl.ai deploys AI agents you own and control—on your infrastructure, integrated with your systems.