CMap vs Milient Project Flow

Firms tend to look for new software at a specific moment: when resourcing, project financials, and invoicing have outgrown what a spreadsheet - or a lightweight task tool - can hold together. Milient Project Flow and CMap both get compared at that stage, because both are aimed at architecture, engineering, and built-environment consultancy (AEC) firms trying to solve exactly that problem.

For the UK, Milient is putting its weight behind Project Flow - a rebrand of Ooti, a French PSA - which is being developed to bring in features from Rapport3 and Moment, a Nordic product. It’s one of several once-separate AEC products Milient has brought under one roof through mergers and acquisitions, and it covers pipeline, planning, timesheets, project financials, invoicing, and reporting.

CMap is the practice intelligence suite for architecture and engineering firms: one product, built and supported in the UK and developed continuously for over a decade, with fees, resourcing, time, invoicing, email and documents connected in one place - one record of every project, with AI working across all of it.

On paper, the core feature sets sit fairly close together. The more useful distinction - and the one worth checking before signing a multi-year contract - is how independently each platform’s claims can be verified, and how settled the product behind it currently is.

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Key capabilities at a glance

Both platforms offer tools that cover the core of the AEC workflow, from quoting and resourcing through to time tracking, project financials, and invoicing.

Milient positions Project Flow as project, time, and resource planning software designed for AEC firms from the smallest studios upward.

CMap covers the same ground as a practice intelligence suite, built for firms from 10 people to 1,000. Practice management tells you what happened; practice intelligence tells you what’s happening now, and what’s coming next - with CMap Intelligence built into every stage of your projects, and documents, drawings and email on the same record.

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Independent Reviews: CMap vs Milient on G2

Project Flow, Moment and Rapport3 don’t have a G2 listing at all, and Ooti, the product behind Project Flow, has just one review - not enough for G2 to produce scores. Independent, third-party review data for Milient’s products is thin wherever you look.

CMap, by contrast, has over 300 independently verified reviews on G2 alone. So rather than a side-by-side score comparison, here’s how CMap performs across G2’s core metrics:

Source: CMap’s G2 profile, October 2026. No equivalent scorecard exists for Milient’s products.

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Feature Comparison: CMap vs Milient Project Flow

Here’s how the two platforms compare feature by feature. With no comparable G2 data available for Milient, its column reflects how Milient describes Project Flow’s own capabilities.

What this means in practice

The clearest starting point when comparing CMap and Milient Project Flow isn’t necessarily a feature - it’s firm size and growth stage.

Milient’s own marketing is explicit about who Project Flow is built for at the smaller end: its site talks directly to firms wondering “whether you’re a two-person studio or a growing consultancy,” and promises the platform “scales with your team” as headcount increases from there. CMap is right-sized for firms from 10 people to 1,000 - firms that need resourcing, forecasting, and financial visibility that stays useful as headcount, project count, and complexity keep climbing.

Where Project Flow comes from matters too. Ooti was built for the French market, where around 90% of its clients are based, and it’s unproven in the UK, with little independent track record here. The fair question for a UK firm is one of commercial incentives, not competence: if the depth a growing UK firm needs is only relevant in the UK, how much of a multi-country vendor’s development budget will realistically go to building it?

It’s also a portfolio rather than one platform. Milient Software formed via a March 2024 merger and has since acquired four companies in roughly two years - Rapport3/Cubic Interactive, Flo10, Hub Planner (rebranded Resource Flow), and Ooti. Project Flow is now being developed to bring together features from Ooti, Moment and Rapport3 - relevant to any firm evaluating a 3-5 year platform commitment, whatever size it’s currently operating at.

CMap takes a different route: one product, one team, and a roadmap that’s been delivered, not just promised. It’s been developed over the last ten years with continual updates guided by the needs of its clients, with stages, fee types and terminology built in, and it’s solely focused on growing architecture, engineering and built-environment consulting firms. Buttress, a B Corp architecture firm, used CMap to move from what it describes as “a fundamental lack of project visibility” to “in-depth project management capabilities,” giving staff more ownership over their own projects as the firm scaled. Trusted by 500+ AEC firms, including over 35 of the AJ100, it’s a stable history prospects can check for themselves.

That focus also shows in how CMap uses the data a firm already holds. CMap Intelligence works where your team works - built into quoting, resourcing and invoicing, flagging a quote that’s potentially light, the best person for the job, and when you’ll really get paid. CMap Chat answers questions across every fee, timesheet, email and drawing, not just the screen you’re on, and firms can connect Claude, Copilot and the AI tools they already use to their data, with permissions intact. It’s safe and governed: AI in the firm’s operations, never in the design, and nothing you store trains anyone else’s models. For a growing firm, the result is less time gathering information and more time acting on it - and it’s a layer of insight Milient’s UK products don’t currently offer.

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Looking for Rapport3 or Ooti?

Rapport3 and Ooti now both sit within Milient’s portfolio, but they arrived from very different places - and what that means for each is worth understanding before planning your next move.

Rapport3

Rapport3 customers have been told twice that a new platform was coming, and both times something else happened. For many years, firms were told the core product would be upgraded with a new front end. That upgrade was then repackaged as a move onto Rapport 3C: a small number of firms were migrated onto it before it was quickly superseded, and those firms have been told they must move again.

Rapport3 and its client base were then acquired by Milient, which has since put its UK emphasis on Project Flow. Milient’s own Rapport3 page tells existing customers to “continue working as usual,” while anyone new is directed to book a demo of Project Flow. Rapport3 is no longer being actively sold, and existing customers will have to be transitioned at some point - but across the firms we’ve spoken with, nobody has been able to get a real timescale for when they’ll be moved, or exactly which product they’ll be moving to.

Ooti

Ooti is a Paris-based PSA, launched around eight years ago and originally built for French architects and interior designers before expanding to engineering firms. Milient acquired it in April 2026, and it’s the product now sold in the UK as Project Flow. France remains the core of its business, with a smaller presence in Benelux, Switzerland and Canada - so for UK firms, the open question is depth, and whether the product will get the development a UK firm needs.

Should I wait to hear what’s next for Rapport3?

You don’t have to. Rapport3 customers will have to be transitioned at some point, but no date or destination has been confirmed. Waiting means the move happens on Milient’s timetable. Looking now means you can compare your options properly and plan a move around your projects and your contract, rather than reacting when the date arrives. Both involve change; only one of them is your decision.

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Who is CMap best suited for?

CMap is purpose-built for professional services firms operating in the built environment, from 10 people to 1,000, including:

• Architecture firms

• Engineering consultancies

• Project management consultancies

• Quantity surveying firms

• Multi-disciplinary AEC consultancies

These firms deliver value through design, technical expertise, and project delivery, which makes managing people, time, project financials, forecasting, and client delivery in one connected system central to how they perform. CMap is particularly suited to firms that have outgrown a “just get by” system and need a platform that keeps working as headcount, project count, and complexity increase - backed by an independently verifiable review track record a prospect can check for themselves.

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Where Milient Project Flow may be a better fit

Milient Project Flow suits organisations that:

• Are very small or single-founder firms, or early in their growth curve and haven’t yet hit the point where deep resourcing or forecasting is a daily need

• Want a lighter system and are comfortable with a newer, still-consolidating vendor

• Operate primarily in France or French-speaking markets, and specifically need multi-language interface support out of the box

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Move on your own timeline

If independently verifiable reviews and a settled product matter as much to your due diligence as the interface does, CMap gives you a G2 track record you can check yourself, from one product with a roadmap that’s been delivered. And when you move, you move on your own timeline: we start with what hurts most rather than a big-bang switchover, with consultants who’ve handled Rapport3 extractions before, and support you every step of the way.

Ask which system you’re actually being shown - then book a demo, and we’ll set it up around your kind of projects and give you a clear, written proposal, including implementation and migration, before you commit to anything.

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*All information accurate as of November 2026.