Custom Internal Tools, Built for You: From $7,500 Fixed
A working internal tool from $7,500, live in two weeks. Typical full builds run $15,000 to $40,000 fixed, against the $50,000 to $150,000+ that a typical dev agency quotes for the same work. A senior engineer builds it, you own every line of code, and it runs in your own cloud with no lock-in.
How much does it cost to build an internal tool?
A working internal tool starts at $7,500 for a two-week pilot, and a full production build is typically $15,000 to $40,000 fixed. The wide range you see elsewhere is real: the same tool can cost $10,000 or $150,000 depending on who builds it and how they bill. Here is the honest market picture as of 2026.
| Who builds it | Typical cost | The catch |
|---|---|---|
| Typical dev agency | $50,000 – $150,000+, 2 to 4 months | PM layer and junior builders on your budget; timeline tends to slip. |
| Freelancer | $10,000 – $40,000, variable | Quality swings hard, and a single-person bus factor owns your tool. |
| DIY on Retool or low-code | Cheap to start | Real engineering time to build well, and per-seat pricing bites at scale. |
| Fire In Belly | Pilot from $7,500, full build $15K – $40K fixed | Senior engineering, fixed scope, you own the code. |
We can quote lower than a typical agency because there is nothing between you and the engineers: no project-manager layer, no sales commission, no junior builders learning on your budget. Same class of work, structurally lower overhead, and a fixed price so you are never surprised by the bill.
When you should NOT pay us
Custom software is the wrong answer more often than most agencies will admit. If any of these fit, keep your money.
A spreadsheet still works
If a shared spreadsheet handles the job at your current volume and the pain is mild, do not build software yet. Come back when the spreadsheet is genuinely breaking under load.
Off-the-shelf covers 90%
If an existing SaaS product does almost everything you need, buy it. Paying us to rebuild a mature product is a waste; we would rather help you configure the one that exists.
A dev can Retool it in a day
If the whole thing is an admin panel a developer on your team can wire up in Retool in an afternoon, that is the right call. We are for the builds that outgrow that.
What kinds of internal tools we build
The common thread is work that lives across too many systems and too many people. These are the four shapes we build most often.
Ops dashboards
One screen that glues your scattered systems together, so the team stops copying numbers between tabs and stale spreadsheets to see what is actually happening.
Approval and back-office workflow apps
Structured tools for the multi-step processes that currently run on email threads and memory: requests, approvals, handoffs, and the audit trail to prove what happened.
AI-assisted document and data processing
Tools that read the invoices, contracts, forms, and messy exports your team processes by hand, extract the fields that matter, and flag the ones a human still needs to check.
Customer-data internal search
A fast internal search over your own records, so support and ops can find the right customer, order, or account in seconds instead of querying three systems.
How we work
You can start with a $1,500 audit if you want the opportunity mapped and costed first, or go straight to a pilot if you already know the tool you need. Either way, the rules are the same.
Fixed scope, fixed price
We agree exactly what the tool does and what it costs before a line is written. No open-ended billing, no scope drift that quietly doubles the invoice.
You own all the code
Everything ships to your repository under your license. No runtime dependency on us, no per-seat platform fee, no vendor lock-in of any kind.
Hosted in your cloud
The tool runs in your own cloud account with your access rules, so your data stays under your control and your team can operate it without us.
Built to hand over
We build in a stack your engineers can maintain and leave the documentation to match, so the tool outlives the engagement instead of depending on it.
What it costs, step by step
Every engagement is fixed-scope and tied to one measurable outcome. You decide at each step whether to continue.
1. Audit
$1,500 fixed
1 week
Costed roadmap. Fee credited toward a pilot.
2. Working pilot
from $7,500 fixed
2 weeks
One tool, one workflow, one KPI measured.
3. Implementation
typically $15K – $40K
scoped after pilot
Fixed quote, no surprise bills.
4. Ongoing partner
from $2,000/mo
optional
Monitoring, iteration, new tools.
We build and operate our own products
We do not just build tools for other people and walk away. We run our own products in production, which means we live with the same reliability, data, and maintenance problems we are asking you to trust us with.
Frequently asked questions
Retool vs a custom internal tool: which should we pick?
Pick Retool when a developer on your team can assemble the tool in a day or two and per-seat pricing stays cheap at your headcount. Pick a custom tool when the logic is specific to your business, when you need it to scale past a handful of seats without the bill climbing, or when you want to own the code outright with no platform lock-in. We build on Retool ourselves when it is genuinely the fastest path for you, and we will say so rather than sell you a bigger build.
Who owns the code?
You do, completely. Every line lands in your repository under your license, with no runtime dependency on us and no per-seat fee to a platform. If you never speak to us again after delivery, the tool keeps running and any developer can maintain it.
What stack do you use?
By default TypeScript with React or Next.js on the front end, a Node or Python service behind it, and Postgres for data, hosted in your own cloud account. We are not dogmatic: if your team already runs a stack, we build in it so your engineers can maintain what we hand over. The goal is a tool your people can own, not a showcase of ours.
How do you handle our data securely?
The tool runs in your cloud account, not ours, so your data never leaves your control. We use scoped, least-privilege credentials, keep secrets out of the codebase, and can work inside your VPC and access rules. For AI features we can route through your own model account so prompts and documents never touch a third-party key we hold.
How long does a build take?
A working pilot tool is two weeks from kickoff. A full production build is typically three to six weeks depending on how many systems it has to connect and how much workflow logic it carries. We fix the scope and the price before we start, so the timeline is a commitment, not an estimate that drifts.
What if we already have a half-built tool?
We are happy to take over an existing internal tool, finish it, and harden it, or rebuild the parts that are holding you back. The audit step is the honest way to decide: sometimes the right answer is to salvage what you have rather than start over, and we will tell you when that is the case.
Not sure a build is even the right move? Start with the AI workflow audit, or see how a tool and an automated workflow fit together.
Get the internal tool your team keeps asking for
A working build from $7,500 in two weeks, fixed price, your code. If a custom tool is the wrong call for you, we will tell you that on the first call.
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