Part3 is a construction administration platform built for architects. Submittals, RFIs, field reports, document review and project records live together with automatic version control, reviewer statuses, revision requests and history, and it advertises AI-assisted submittal and specification comparison on top. Drawings and PDFs are reviewed inside that, as part of running the contract rather than as a job of their own.
Xenmark runs one job end to end: a drawing set goes out for review, comments come back against the revision they were raised on, and the review finishes as two documents — a plan showing where each comment sits, and a spreadsheet saying what each one means, numbered to match.
These two products are not really priced against each other. Part3 states that annual subscriptions start at $9,000 a year, which is five Core users, because what it sells is the administration of a project rather than the review of a drawing set. Choose Xenmark when the drawing review is the job and it has to end in a numbered plan and a matching register. A free Xenmark project takes a real drawing set from start to finish.
Part3 sells Core at $150 and Complete at $200 per user per month, billed annually, with no permanent free tier — its homepage puts the entry point at $9,000 a year. The Xenmark Free plan runs one active review from start to finish, exports included, with no card and no expiry.
Xenmark measures length, polylength, perimeter and area against the page scale, and those values land on their own sheet in the same Excel file as the comments. Part3’s markup documentation lists stamps, text, shapes, comment boxes and callouts, and no measurement or scale tool at all.
A Xenmark review ends in a drawing with each comment numbered where it applies, and an Excel register numbered to match, produced from the same comments in one step. Part3 holds the review inside its project records.
Every Part3 claim below is taken from Part3's own published material and was last checked on 29 August 2026. Software changes; if something here is out of date, tell us and we will correct it.
Part3 does a great deal that Xenmark does not attempt. Submittals, RFIs, field reports, specification review and the project record all sit in one place, with automatic version control, reviewer statuses, revision requests, @mentions, attachments and history around them, plus AI-assisted submittal and specification comparison. It works alongside Procore, Deltek and Bluebeam. If you are running construction administration for an architectural practice, that is the product and Xenmark is not.
Its markup is also richer than ours in one specific way: it carries both static and dynamic stamps, alongside text, shapes, comment boxes and callouts. Xenmark has five fixed review symbols and no stamp library of any kind.
The difference is what each one is for, and the prices say it plainly. Part3 publishes Core at $150 and Complete at $200 per user per month, billed annually, with unlimited free collaborator seats on both, and no permanent free tier. Its markup documentation lists no measurement, scale or takeoff tool.
| Xenmark | Part3 | |
|---|---|---|
| Starting a review | ||
| Can the person running the review start free? | Yes — the Free plan runs one active review at a time, start to finish | No permanent free plan is published. Part3 sells Core at $150 and Complete at $200 per user per month, both billed annually, and its homepage states that annual subscriptions start at $9,000 a year — five Core users. |
| Do external reviewers need a paid subscription? | No — the people you invite read, reply and download the exports without paying | No — both plans include unlimited free collaborator seats. Project participants, consultants and @mentions are part of the workflow, and the seats they occupy are not charged for. |
| Available platforms | Any modern browser — nothing to install, and the people you invite join from a link | Browser, with mobile field reports including offline capture. |
| How the review is structured | ||
| What the review is built from | A numbered comment. Anything drawn on the page belongs to that comment rather than standing on its own. | A construction administration record — a submittal, an RFI, a reviewed document — with the PDF attached to it and line items, reviewer statuses and revision requests around it. |
| Replies | Threaded under the comment, each attributed and dated, with image attachments, and carried into the register | Yes — comments with @mentions and attachments, alongside reviewer status and revision requests. |
| Status workflow | Open, In progress and Closed — three fixed states, and the status travels into the Excel register | Yes. A review mode with statuses, revision requests and history is part of the document and submittal workflow; the exact labels depend on how the workflow is configured. |
| Comment numbering | Numbers are stable — delete comment 5 and the gap stays, so item 12 still means item 12 in every email and every export | Field-report items carry structured identifiers. |
| One issue, several drawing locations | One comment can own several markers while keeping one number and one reply thread | The PDF viewer carries comment boxes, callouts, shapes and notes, each placed on the sheet. |
| Activity history | Every action timestamped and attributed to the person who made it | Yes — automatic version control, revision requests and history are part of the record. |
| Revision handling | Comments stay tied to the revision they were raised against, in one workflow | Automatic version control, with history and revision requests. |
| Measuring and markup | ||
| Measuring on the drawing | Length, polylength, perimeter and area, calibrated to the page scale | Part3’s markup tools are text, shapes, comment boxes, callouts and stamps. |
| Setting the drawing scale | Pick a standard scale, type your own, name the sheet size, or calibrate from a distance you already know | The markup tools work on the PDF as it was issued. |
| Building your own reusable symbols | Check, cross, attention, arrow and cloud — five fixed review symbols, not a custom library | Stronger here. Part3 documents both static stamps and dynamic stamps. Xenmark has five fixed review symbols and no stamp library. |
| Measuring quantities for pricing a job | Not included — measurements are there to explain a comment, not to cost work | Part3 is a construction administration platform. Neither product is intended for quantity takeoff. |
| What comes out of the review | ||
| What you send back | The two documents come out ready to send — there is nothing to set up first, because the review was structured that way from the start | The reviewed record inside the project — line items, reviewer status, comments, mentions, attachments, revision requests and history. |
| Comment plan PDF | The drawing with each comment numbered and shown where it applies | PDFs are annotated in place within the record. |
| Spreadsheet output | An Excel file listing every comment, numbered to match the PDF | Yes. A project export carries “all document comments and history” as CSV, consultant comments included. |
| Measurements in the export | Drawn on the comment plan PDF where they were placed, and listed on their own sheet in the Excel file, kept separate from the comments | The CSV export carries the document comments and their history. |
| What you keep when the project ends | A single zip file — every revision's exports, the attachments and the full activity log, downloaded and stored on your side | The project record, with its versions and history, held in the platform. |
| Branded reports | Your company logo and text on both deliverables, inherited from Company Settings — Plus and Pro | Yes, and thoroughly. Company logos, brand colours, disclaimers, branded cover pages, reusable report layouts, and static and dynamic stamps. |
| What else each one does | ||
| Batch operations across many PDFs | Not included — a review works on one drawing set at a time | Yes. Combined drawing-set PDFs import, several disciplines upload together, sheets split automatically, the latest drawing set downloads, and a project ZIP exports with the final PDFs and attachments. |
| Comparing two drawings against each other | Not included — differences get raised as comments by the people reviewing | AI-assisted submittal and specification comparison is advertised, which compares documents rather than overlaying two drawings. |
| Working offline | Browser only, so you need a connection | Field reports work offline on mobile. Xenmark needs a connection throughout. |
| Storing documents long term | Not what it is for. You download the exports and keep them wherever your project records already live. | Yes — the project record with automatic version control is the core of the product. |
| CAD integrations and creating PDFs from CAD | None — a review starts from a PDF that has already been produced | Like Xenmark, Part3 starts from a PDF that has already been produced. |
| Connecting to a document management system | No integrations yet — the closing archive is a single zip you file wherever your records already live | Yes — the homepage names Procore, Deltek and Bluebeam, positioned as working alongside Part3. Xenmark has no integrations yet. |
Part3 publishes two plans, both per user and both billed annually: Core at $150 and Complete at $200 per user per month. Both carry unlimited projects and unlimited free collaborator seats, and the selector starts at five users — so the smallest Core commitment is $9,000 a year and the smallest Complete commitment $12,000. Discounted rates are offered above fifty users or beyond a one-year commitment. There is no permanent free plan. Xenmark is €14.99 – €59.99 / month, with a Free plan that runs a complete review.
The gap is large enough that comparing the numbers is beside the point. Part3 is priced as practice software for an architectural firm running construction administration across its projects. Xenmark is priced for the drawing set in front of you. A firm that needs the first will not find it in the second, and a team that needs the second is not going to buy the first to get it.
| Xenmark | Part3 | |
|---|---|---|
| Billing unit | Per project capacity, monthly | Per user per month, billed annually, with a five-user minimum |
| Entry point | Free — one active review, start to finish, no card | No permanent free plan. A free trial is offered on request to customers in Canada and the United States |
| To run a review yourself | Free | From $9,000 a year — five users on Core at $150 each per month |
| Paid range | €14.99 – €59.99 / month | Core $150 and Complete $200 per user per month, billed annually; five-user minimum, so $9,000 and $12,000 a year |
| Invited reviewers | Free — no per-user charge; 5–30 project members depending on plan, and the person running the review is one of them | Free — both plans include unlimited free collaborator seats |
| Tax basis | Including VAT | USD · customer responsible for applicable taxes |
Xenmark — current as of 29 August 2026. Part3 — checked 29 August 2026. Part3 now publishes the per-user rates behind the $9,000: Core at $150 and Complete at $200 per user per month, billed annually, with a five-user minimum — so $9,000 and $12,000 are the smallest annual commitments rather than open-ended floors. Prices are in US dollars and Part3’s terms make the customer responsible for applicable taxes; Xenmark prices are in euro and include VAT, and nothing is converted. Anyone weighing the two seriously should compare a quote they have actually received against the plan they would actually use.
No permanent free plan. Part3’s homepage states that annual subscriptions start at $9,000 a year, and a free trial is offered on request to customers in Canada and the United States.
The Xenmark Free plan runs one active review from start to finish, with the comment plan and the Excel register included, no card and no expiry. That is the practical difference between the two: one is bought for a practice, the other can be tried on the drawing set in front of you.
Core is $150 and Complete is $200 per user per month, both billed annually, with unlimited projects and unlimited free collaborator seats on each. The selector starts at five users, so the smallest commitments are $9,000 and $12,000 a year — which is where the homepage’s “from $9,000” comes from. Discounted rates are offered above fifty users or beyond a one-year commitment.
Xenmark is €14.99 – €59.99 / month, in euro including VAT. Part3’s figures are in US dollars and its terms make the customer responsible for applicable taxes; nothing here is converted.
Yes — its markup help documents static stamps and dynamic stamps, text, shapes, comment boxes, callouts and PDF annotations, with comments carrying @mentions and attachments alongside reviewer statuses and revision requests.
On stamps it does more than Xenmark, which has five fixed review symbols — check, cross, attention, arrow and cloud — and no stamp library at all.
Part3’s markup help lists stamps, text, shapes, comment boxes, callouts and PDF annotations.
Xenmark measures length, polylength, perimeter and area against the page scale, and puts those values on their own sheet inside the same Excel file as the comments. It is not a takeoff or estimating product either, but the numbers do come out.
Part3 keeps the review inside the project record — line items, reviewer status, comments, mentions, attachments, revision requests and history — which is a different thing from an exported register you send to someone outside the platform.
In Xenmark the Excel register lists every comment numbered to match the comment plan PDF, with the measurements on their own sheet in the same file, and both come out ready to send.
Yes. Automatic version control, history and revision requests are core to the document and submittal workflow, which is what a construction administration platform is for.
In Xenmark a comment stays tied to the revision it was raised against, and all of the revisions sit inside the same review.
No, and only a small part of Part3 overlaps with it at all. Part3 runs construction administration for architects — submittals, RFIs, field reports, specification review and the project record, with AI-assisted submittal and specification comparison and links to Procore, Deltek and Bluebeam.
Xenmark covers the part where a drawing set goes out to several people for comment and something structured has to come back. A practice that needs contract administration needs Part3 or something like it; Xenmark will not substitute for it.
When the drawing review is one task inside running the contract, and submittals, RFIs, field reports and the project record matter more than what the review hands over. When the record itself is the deliverable. When you need to work alongside Procore, Deltek or Bluebeam. And when the buyer is an architectural practice rather than one team with one drawing set.
We sell Xenmark, so this is not an independent review. We have tried to describe Part3 accurately, and every Part3 claim on this page rests on Part3’s own published pages and help centre. The documents are named below. Capabilities and pricing change. Part3 feature information was last checked on 29 August 2026, and the pricing on 29 August 2026.
Part3’s markup help article is linked, so the claims here can be checked against the source they rest on. The homepage, which is where the price is published, is named rather than linked. Where Part3’s published material does not settle a row, this page says so rather than treating silence as an absence.
The Free plan takes a real drawing set end to end. No card, no time limit.
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