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Endra vs Rebar

Two AI-first MEP tools that sit on opposite sides of the bid. Endra is a design platform for MEP engineers, with electrical design live (power distribution, lighting, fire alarm, circuiting, cable and equipment sizing, routing), mechanical listed for 2027 and plumbing not yet available, plus Playbooks, agents and two-way Revit sync. Rebar is an estimating and bid management platform for commercial mechanical contractors, with bid triage, a bid board, schedule-reading and ductwork takeoff, spec Q&A and a bid CRM. Neither publishes prices. Desk research from vendor pages read Oct 29, 2026; not tested, no winner.

DESK RESEARCH, NOT TESTED. Compiled from vendors' public websites (accessed Oct 29, 2026). Vendor claims are not verified by Means & Methods Lab. No scores or rankings.

In short: Endra (AI MEP engineering design; no public prices (quote / sales)) vs Rebar (AI estimating for mechanical contractors; no public prices (quote / sales)). Facts last checked Oct 29, 2026. No winner declared; not tested.

Side by side

Endra vs Rebar: vendor-published facts side by side
Sheet rowEndraRebar
CategoryAI MEP engineering designAI estimating for mechanical contractors
AI role (our label)AI-firstAI-first
What it doesAI-powered MEP design platform with live electrical design, mechanical listed for 2027 and plumbing in development, plus two-way Revit sync. Electrical is listed as live: power distribution, lighting and fire alarm, with unit placement, circuiting, cable and equipment sizing, and routing. Mechanical (HVAC routing, energy modeling, simulation, calculations) is listed with an ETA of 2027; plumbing is listed as in development. Endra Power Studio produces models, drawings, schedules, calculations, diagrams and documentation; Playbooks encode a firm's design standards, agents handle tasks such as cable routing, typical-room design is replicated across a project, and models sync both ways with Revit. Vendor claims a 12x productivity increase (vendor claim, not verified). The CSV records a $50M Series A led by Andreessen Horowitz. Re-read Oct 17, 2026: FAQ lists Power Studio outputs as the electrical 3D model, Revit model, single line diagrams, drawings, panel board schedules, cable schedules, electrical equipment schedules, load calculations and bill of materials; a Diagnostics feature compares model versions and flags added, removed and relocated items; the platform is rolling out in the U.S., UK, EU and Middle East; Endra says it does not train on input models and lists ISO 27001, SOC 2 Type II, Cyber Essentials Plus and GDPR (vendor statements). Demo is a 30-minute session. Re-checked Oct 19, 2026: Electrical is still live and Mechanical still ETA 2027; Plumbing is now shown as To be announced on the product overview (the menu still says In development). The homepage now also cites 91% of users accomplishing more and 97% responding to RFIs faster alongside the 12x figure (vendor claims, not verified), and notes Endra is not affiliated with the NFPA or BSI and references standards such as NFPA 70 and NFPA 72 as requirements the software applies. FAQ, certifications and rollout regions unchanged. Re-checked Oct 20, 2026: unchanged in substance (Electrical live, Mechanical ETA 2027, Plumbing To be announced on the product overview and In development in the menu; same FAQ, certifications, rollout regions and vendor figures). Re-checked Oct 22, 2026: homepage unchanged in substance (Electrical live, Mechanical ETA 2027, Plumbing To be announced on the page and In development in the menu; Power Studio, Playbooks, Typical Rooms, agents and two-way Revit sync; the same FAQ, certifications and rollout regions). The Playbooks demo now shows an engineer giving the agent a plain-language instruction against a room data sheet, and the footer links a Trust Center and a status page. The vendor productivity and survey figures are still not used. Re-checked Oct 23, 2026: homepage unchanged in substance (Electrical live, Mechanical ETA 2027, Plumbing in development; Power Studio, Playbooks, Typical Rooms, agents and two-way Revit sync; the same FAQ, certifications and rollout regions). The menu now links Epoch, a recap page for an Endra event held Sept 14, 2026 at AREA15 in Las Vegas that included a Power Studio demo. The vendor productivity and survey figures are still not used. Re-checked Oct 25, 2026: homepage unchanged in substance (Electrical live, Mechanical ETA 2027, Plumbing in development; Power Studio and Playbooks); the Epoch page still recaps the Sept 14, 2026 event at AREA15 in Las Vegas. The vendor productivity and survey figures are still not used. Re-checked Oct 27, 2026: homepage unchanged in substance (Electrical live, Mechanical ETA 2027, Plumbing in development; Power Studio and Playbooks). The Epoch page still recaps the Sept 14, 2026 event and now lists session videos (an aftermovie, keynotes, a fireside and a Power Studio demo). Vendor productivity and survey figures are still not used. Re-checked Oct 29, 2026: homepage unchanged in substance (Electrical live, Mechanical ETA 2027; Plumbing shown as To be announced on the page and In development in the menu; Power Studio, Playbooks, Typical Rooms, agents and two-way Revit sync; ISO 27001, SOC 2 Type II, Cyber Essentials Plus and GDPR per the vendor). The Epoch page still recaps the Sept 14, 2026 event. Vendor productivity and survey figures are still not used.AI estimating and bid management platform for commercial mechanical teams, with bid-request triage, ductwork takeoff, spec Q&A and a bid CRM. It offers automatic reading, tagging and prioritizing of inbound bid requests, AI ductwork takeoff (weight, materials, lengths, accessories) and equipment schedules, spec-and-plan Q&A that cites the clause it read, a lightweight bid CRM through award, and market analytics (for example engineers and architects of record, basis-of-design share). A customer testimonial on the site says a project that took up to 2 days now takes 6 to 8 hours (customer claim, not verified). Re-checked Oct 19, 2026: the site adds live manufacturer pricing in takeoff, an analytics chat that answers questions about your own bid activity (for example basis-of-design share by manufacturer), and lists SOC 2 Type I, per-company data isolation and NDA-ready projects. The 60% faster takeoff figure is a vendor claim. Re-checked Oct 21, 2026: homepage unchanged in substance (bid-request triage, a bid board, takeoff that reads schedules, counts equipment and extracts spec requirements with live manufacturer pricing, spec Q&A citing the clause it read, a bid CRM and an analytics chat; SOC 2 Type I and per-company data isolation). The navigation adds a Referral Program (terms not repeated here), and the homepage carries named customer testimonials, which are not used. Re-checked Oct 22, 2026: homepage unchanged in substance (bid triage, bid board, takeoff with live manufacturer pricing, spec Q&A, bid CRM, analytics chat); the footer lists HVAC takeoff, Bid Board, Bid Triage and Market Intelligence. The 60% faster takeoff figure and named testimonials are vendor content and not used. Re-checked Oct 23, 2026: homepage unchanged in substance (now titled an AI takeoff and estimation platform for mechanical teams: bid triage, bid board, takeoff that reads schedules and counts equipment with live manufacturer pricing, AI ductwork takeoff, spec Q&A citing the clause, bid CRM, analytics chat; SOC 2 Type I, data isolation, NDA-ready). The 60% faster takeoff line, counters, referral terms and named testimonials are vendor content and not used. Re-checked Oct 24, 2026: homepage now headlined as an AI estimating platform for mechanical teams, with bid management and business intelligence for commercial mechanical teams; features unchanged (bid triage inbox, bid board, schedule-reading takeoff with live manufacturer pricing, AI ductwork takeoff, spec Q&A citing the clause, bid CRM, analytics chat, SOC 2 Type I per the vendor). Re-checked Oct 26, 2026: homepage unchanged in substance (AI estimating platform for commercial mechanical teams: bid triage, bid board, schedule-reading takeoff with live manufacturer pricing, AI ductwork takeoff, spec and plan comparison, bid CRM, analytics chat; SOC 2 Type I per the vendor). Named testimonials and referral terms are vendor content and not used. Re-checked Oct 29, 2026: homepage unchanged in substance (AI estimating platform for commercial mechanical teams: bid triage, bid board, schedule-reading takeoff with live manufacturer pricing, AI ductwork takeoff, spec and plan Q&A citing the clause, bid CRM, analytics chat; SOC 2 Type I, data isolation and NDA-ready projects per the vendor). The 60% faster takeoff line, named testimonials and referral terms are vendor content and not used.
Who it's forMEP engineering firms and electrical engineers designing buildings in Revit.Commercial HVAC, mechanical and plumbing contractors' estimators and bid coordinators.
Pricing (as publicly stated)No public prices found (checked Oct 16, 2026): the vendor site has no pricing or plans link in its navigation or footer, and /pricing and /plans return a not-found page. The site's calls to action include "Book demo". Confirm current pricing with the vendor. Re-checked Oct 19, 2026: unchanged. (/pricing returns 404). Re-checked Oct 20, 2026: unchanged (/pricing returns 404; Book demo for a 30-minute session). Re-checked Oct 22, 2026: unchanged (/pricing returns 404; Book demo for a 30-minute session). Re-checked Oct 23, 2026: unchanged (/pricing returns 404; Book demo for a 30-minute session). Re-checked Oct 25, 2026: unchanged (/pricing returns 404; Book demo). Re-checked Oct 27, 2026: unchanged; /pricing still returns not found and there are no prices. Re-checked Oct 29, 2026: unchanged; /pricing still returns not found and the call to action is a 30-minute demo.No public prices found (checked Oct 16, 2026; unchanged Oct 19, 2026, /pricing still not-found): the vendor site has no pricing or plans link in its navigation or footer, and /pricing and /plans return a not-found page. The site's calls to action include "Book a demo". Confirm current pricing with the vendor. Re-checked Oct 21, 2026: still no prices; /pricing returns not found and the call to action is Book a demo. Re-checked Oct 22, 2026: still no prices; /pricing returns a not-found page and the call to action is Book a demo. Re-checked Oct 23, 2026: still no prices; /pricing returns a not-found page and the call to action is Book a demo. Re-checked Oct 24, 2026: still no published prices (/pricing returns not found); Book a demo only. Re-checked Oct 26, 2026: still no published prices (/pricing returns not found); Book a demo only. Re-checked Oct 27, 2026: still no published prices (/pricing returns not found); Book a demo only. Re-checked Oct 29, 2026: still no published prices (/pricing returns not found); Book a demo only.
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Facts last checked: Oct 29, 2026. Prices change; check the vendor page before relying on them.

Where the vendor descriptions differ

  • Not like-for-like: Endra produces the design (models, drawings, schedules, calculations and documentation) for the engineer of record's side; Rebar reads the finished plan set and specs to help a mechanical contractor price and win the job. A mechanical estimator would not replace one with the other.
  • Trades: Endra lists electrical as live and mechanical (HVAC routing, energy modeling, simulation and calculations) with an ETA of 2027; plumbing is shown as To be announced on its page and In development in its menu. Rebar is built around commercial mechanical bids, with plumbing and refrigeration bid sets shown in its product screens.
  • Outputs: Endra's FAQ lists the electrical 3D model, the Revit model, single line diagrams, drawings, panel board schedules, cable schedules, equipment schedules, load calculations and a bill of materials. Rebar lists equipment counts from schedules with live manufacturer pricing, ductwork takeoff (weight, materials, lengths, accessories), spec answers that cite the clause read, and analytics such as basis-of-design share by manufacturer.
  • Integration: Endra says it syncs both ways with Revit and flags model changes through a Diagnostics feature. Rebar works from plan sets and bid emails; its homepage does not describe a Revit connection.
  • Security (vendor statements): Endra lists ISO 27001, SOC 2 Type II, Cyber Essentials Plus and GDPR and says it does not train on input models. Rebar lists SOC 2 Type I, per-company data isolation and NDA-ready projects.
  • Pricing (checked Oct 29, 2026): neither publishes prices. Endra's /pricing returns not found and it offers a 30-minute demo; Rebar's /pricing returns not found and it offers Book a demo. See each tool page for detail.
  • Not used here: Endra's 12x productivity and user survey percentages, and Rebar's 60% faster takeoff line, counters and customer testimonials (vendor material). Neither tool has been tested by Means & Methods Lab.

Paraphrased from the sources listed above. Vendor claims are reported as claims.

What users say

The facts above come from vendor websites. Whether either tool is any good for your work is something only people who use them can say. These are member reviews, all ratings shown, never edited or removed for being negative.

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Questions to ask in your review

  • Whether a Rebar takeoff reads an Endra-generated electrical or mechanical set as cleanly as a hand-drafted one
  • When Endra's mechanical module actually ships and which code editions it applies
  • What each costs per seat, project or company
  • What did you use it for, on what kind of work and project size?
  • How long did setup and training take, and who on your team did it?
  • What does it cost you in practice, compared with what the sales call said?

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