Plumb reads your brief, finds the complexity your client forgot to mention, and generates a detailed, defensible estimate in minutes -- not a Sunday afternoon. Win more bids at margins that actually survive delivery.
Freelancers and agencies lose an average of 22% of project revenue to scope creep and underestimation. It is not a one-time loss. It compounds every single month.
You win the job, then spend the next three months delivering far more than you quoted. The client is happy. Your bank account is not. You do it again next month.
Senior developers and designers spend 4-8 hours per proposal on estimation alone -- time that generates zero revenue. That adds up to thousands in lost billing per quarter.
Clients change requirements. Integrations are messier than they look. Without thorough upfront analysis, you absorb every surprise as lost margin, often without the client even realizing it.
When two similar projects come back with wildly different estimates, clients notice. Plumb ensures your methodology is consistent, documented, and defensible every time you send a proposal.
Plumb is not a calculator. It is an AI analyst that reads your brief the way a seasoned project manager would -- then builds the full breakdown so you don't have to.
Drop in an email, a Notion doc, a Slack thread, or your own bullet points. Plumb reads natural language with no templates required. The messier the brief, the more value the analysis adds.
The model identifies deliverables, flags unstated assumptions, estimates complexity for each component, and surfaces risk factors the client probably didn't mention -- because they didn't know to.
Get a structured breakdown with hours by role, line-item costs, contingency ranges, and assumption documentation. Export to PDF or paste into your existing proposal. Fully editable before you send.
Not a spreadsheet template. Not a flat rate calculator. A genuine AI analysis layer that understands project complexity the way experienced practitioners do -- and documents every assumption so you're protected when things shift.
Plumb identifies integration requirements, edge cases, and stakeholder coordination overhead that clients routinely omit from briefs -- and adds appropriate hours automatically.
Every estimate ships with best-case, expected, and worst-case ranges. Set realistic expectations with clients upfront and protect yourself when reality lands somewhere between the lines.
Every assumption baked into the estimate is logged automatically. When scope shifts, you have a documented baseline that protects your margins and drives defensible change order conversations.
Connect past projects and Plumb learns your actual delivery velocity. Estimates improve with every project you complete, becoming more accurate the longer you use the platform.
Assign different hourly rates to different roles. Plumb allocates hours by role based on the work required, then calculates blended totals automatically for budget conversations.
One-click PDF exports formatted for client delivery. Or pull raw data into your own proposal template via API. Either way, your estimate looks as professional as the work you deliver.
Over 2,400 independent professionals and agencies have run estimates through Plumb since launch. Here is what they found on the other side.
"I used to spend half a Sunday building estimates for Monday proposals. Now I paste the brief, review the output in fifteen minutes, and send. My close rate actually went up because my estimates look more thorough."
"The assumption documentation alone is worth the price. I finally have a paper trail when clients try to redefine the project midway through. We have not had a scope-creep blowup since we started using it."
"I knew I was undercharging but couldn't figure out where. Plumb surfaced three recurring line items I was silently absorbing. Fixed that in my next proposal. Added $3,400 in margin on a single project."
Spreadsheets require manual entry and produce a single number. Generic PM tools do not read your brief. Plumb is the only tool built specifically for the pre-project estimation problem.
| Capability | Plumb | Spreadsheet Templates | Generic PM Tools |
|---|---|---|---|
| Reads unstructured briefs | Yes | No -- manual entry only | No |
| Flags hidden complexity | Yes -- automatically | No | No |
| Confidence ranges | Best / Expected / Worst | Single number only | Limited |
| Assumption documentation | Automatic on every estimate | Manual, if at all | Manual |
| Historical calibration | Yes -- improves over time | No | Limited |
| Client-ready PDF export | One click | Manual formatting required | Yes |
| Time to first estimate | Under 10 minutes | 4-8 hours | 2-4 hours |
Every plan includes a 14-day free trial with no credit card required. Cancel anytime with no friction and no penalty. Your estimates are yours -- we'll export everything before you go.
For independent freelancers managing their own client flow with up to 10 active proposals per month.
For small agencies and consultancies running multiple concurrent clients and recurring proposals.
For agencies with multiple estimators, shared client libraries, and reporting requirements across teams.
Plumb is trained primarily on software development, web design, branding, and digital marketing projects. It performs best when the brief describes a deliverable with clear technical or creative components. Large civil or construction projects are outside its current scope.
When you mark a project as completed, you can log the actual hours delivered. Plumb compares actuals vs. estimates by category and adjusts its confidence ranges over time to reflect your team's real delivery pace -- not generic industry averages.
No. Everything you create stays private until you choose to export and share. Plumb does not have a client portal -- exports are flat PDF documents you send through your existing channels.
It will happen. No tool eliminates estimation error entirely. That is why Plumb always exports assumption logs -- so when scope shifts, you have a documented baseline for a change order conversation rather than an argument about what was originally agreed.
No. Your project data is used only to calibrate your own estimates within your account. We do not train shared models on customer content. Full details are in the privacy policy.
General-purpose chat tools produce estimates but don't document assumptions, don't learn from your past projects, and don't export client-ready formats. Plumb is a dedicated workflow -- estimate, document, calibrate, export -- built around how proposals actually get sold.
Agency plan subscribers get full API access, making it straightforward to pull estimate data into Proposify, PandaDoc, or any custom proposal stack. Solo and Studio users can copy/paste line items or use the PDF export directly.
Yes, with no questions and no cancellation fee. Your estimates remain accessible for 30 days after cancellation so you can export anything you need before the account closes.
Start your 14-day free trial. No credit card required. Paste your first brief and see exactly what Plumb finds in the scope you thought was simple.