# Avoice

Aiolum story: https://aiolum.com/story/avoice/ · added 2026-11-06 · updated 2026-11-06

**In short.** Avoice (AI workspace for architecture and engineering practices: specifications, drawing checks, contract administration and practice management, United States): 250+ practices claimed on its home page, November 2026. Evidence grade E: no revenue figure was checked. Team: 2 founders (YC launch post, March 2026); 7 people on the YC company page, November 2026. Launched February 2026; still running.

AI workspace for architecture and engineering practices: specifications, drawing checks, contract administration and practice management · United States · AI-native · team of 2 to 10 · still running · group: Real estate and architecture visuals

- Outcome: 250+ practices claimed on its home page, November 2026 (evidence grade of the headline number: E; no revenue figure)
- Launch: February 2026; months from launch to the outcome: 9
- Team: 2 founders (YC launch post, March 2026); 7 people on the YC company page, November 2026
- Outside funding: Y Combinator (Winter 2026) and other investors; amounts not published
- Main factor: Niche
- Meters, 1 to 4: evidence strength 1, copyable pattern 1, capital needed 2
- Tags: AI-native, Small team, Funded, Running, B2B, Architecture

Links:

- Visit avoice.co: https://www.avoice.co/

**The product.** A web platform for architecture and engineering practices. Its most-used part writes construction specifications, the written documents that say which materials, products and standards a building must use, from the practice's own drawings, schedules and past specifications, and then checks them back against the drawings. Around it are drawing checks before issue, RFIs and submittals during construction, building-regulation lookups for the UK and Ireland, and timesheets, fees and invoices.

**Why it worked.** Specification writing is slow, repetitive work that architects do by hand across PDFs and spreadsheets, and the older specification software is expensive and hard to leave, as the company's about page argues. A language model can draft clauses in a practice's own wording if it is given that practice's past documents, so the company sells one licence per person who writes specifications instead of one per office seat.

Evidence grades: A = disclosed by a public company, a filing or a payment processor, or verified by one; B = two or more independent reports agree, or a journalist confirmed it; C = a founder claim that no one else verified; D = reported, not verified: one founder claim or a third-party estimate with no second source; E = no revenue figure found, so the headline is a non-money fact and the other facts carry their own grades; calc = computed on this page from graded facts.

## Summary

Avoice is an AI workspace for architecture firms. Its main job is the specification, the written part of a building's design documents that names every material, product, standard and workmanship rule, often running to hundreds of clauses. Avoice drafts the specification from the practice's own drawings, schedules and office master, a practice's standard library of clauses that it reuses on every project, and then checks the text against the drawings. It also checks drawing sets for clashes before issue, reviews submittals (the product data a contractor sends for approval) against the clauses they answer, and runs timesheets, fees and invoices.

Chawin Asavasaetakul (CEO) and Chawit Asavasaetakul (CTO) founded it; the YC company page gives 2025 as the founding year. In November 2025 the avoice.co domain showed a different product, AI sales intelligence; by February 2026 it showed the architecture workspace, and the first YC launch post for it is dated 11 February 2026. The company is in Y Combinator's Winter 2026 batch. In March 2026 the founders wrote that "Over $300M in construction projects" were run on the platform by firms in 5 countries, and in November 2026 the home page says it is "Trusted by 250+ practices". The YC page lists 7 people.

No revenue figure was found, so this story is grade E: the business is real, live and selling plans in pounds sterling, but how much it earns is not public. The page also shows earlier construction companies that raised large sums and failed.

## Pricing

Avoice prices from its pricing page, read 6 November 2026, in pounds excluding VAT and converted to US dollars on this page

| Plan | Per month, billed yearly (US$) | Per month, billed monthly (US$) | Limit |
|---|---|---|---|
| Specs, Solo |  | 201 | 1 spec licence, 1 person (£150) |
| Specs, Pro |  | 469 | 3 spec licences, up to 10 people (£350) |
| Specs, Team |  | 670 | 5 spec licences, up to 25 people (£500) |
| Full Suite, Solo |  | 268 | 1 person (£200) |
| Full Suite, Pro |  | 670 | 3 licences (£500) |
| Full Suite, Team |  | 938 | 5 licences (£700) |
| Enterprise |  | quoted | 26+ people |

The pricing page lists prices in pounds a month, excluding VAT: Specs at £150 (Solo, 1 licence), £350 (Pro, 3 licences, practices of 2 to 10) and £500 (Team, 5 licences, 11 to 25 people); Full Suite at £200, £500 and £700. Extra licences cost £60 to £110 a month, Suite seats £30 and Timesheet seats £8 to £10. The first two months are billed monthly, then quarterly; the page says an annual licence is cheaper but gives no amount, so the yearly column is empty. Conversion at US$1.3398 per pound, the US Federal Reserve H.10 noon buying rate for 30 October 2026, rounded to whole dollars.

## How much revenue does Avoice make? The numbers, graded

A YC-backed AI specification and practice workspace for architects, live with published plans from £150 a month

| Fact | Value | Grade | Note | Sources |
|---|---|---|---|---|
| Practices claimed on the home page, November 2026 | 250+ practices and in-house design teams | C | Home page read 6 November 2026: 'Trusted by 250+ practices and in-house design teams of all shapes and sizes'. The same sentence was on the home page in the Internet Archive copy of 29 July 2026. The company's own claim; not checked. | [4, 8] |
| Construction value run on the platform, March 2026 | over US$300 million in projects, firms in 5 countries | C | Founders' YC launch post of 8 March 2026: 'Over $300M in construction projects are currently operating on the platform across firms in 5 countries.' This is the value of the customers' buildings, not Avoice revenue. The 11 February 2026 post says '$300M+ in active projects'. | [3, 2] |
| Countries named by the company | UK, US, Australia and New Zealand | C | YC company description: practices 'from boutique studios to firms of several hundred people'. | [1] |
| Founders | Chawin Asavasaetakul (Founder/CEO) and Chawit Asavasaetakul (Founder/CTO) | C | YC company page and the March 2026 launch post. Chawin previously worked two years with architects as co-CEO of a coatings company; Chawit did AI research at UCSF and UC Berkeley and worked on Alexa+ at Amazon, the post says. | [1, 3] |
| Team size, November 2026 | 7 | C | YC company page, read 6 November 2026. | [1] |
| Funding | Y Combinator Winter 2026; Spot VC, Twenty Two Ventures, Accel Scout Fund and Alecla7 named on the about page | C | No amounts published. The YC group partner is Jared Friedman. | [1, 6] |
| Founded | 2025 | C | YC company page 'year_founded'. The architecture product's first YC launch post is dated 11 February 2026. | [1, 2] |
| Lowest price | £150 a month (about US$201), Specs Solo | calc | Calculated: the pricing page lists £150 a month excluding VAT; converted at US$1.3398 per pound (Federal Reserve H.10, 30 October 2026). | [5, 9] |
| Integrations | Revit, ArchiCAD and Vectorworks; Xero and QuickBooks | C | Pricing page and YC company description. | [5, 1] |
| Data hosting and audits | AWS UK region; Cyber Essentials Plus; SOC 2 Type II under way | C | Security page. AI model providers are not named; the page says they work under zero-data-retention terms. | [7] |
| Time from launch to the November 2026 claim | 9 months | calc | Calculated: February 2026 to November 2026. | [2, 4] |

How to read this table: company values are what Avoice's own pages and its YC launch posts said; YC values come from the YC company page read on 6 November 2026. Prices are converted from pounds on this page (grade X). No value is grade A or B.

## When did Avoice launch, and how did it grow? Timeline

From an AI sales product on the same domain in late 2025 to an architecture workspace with published prices in 2026. Each entry carries its grade.

- **November 2025** (grade C [8]): The avoice.co home page, in an Internet Archive copy of 28 November 2025, shows 'AVoice', an AI sales intelligence product that captures sales calls, texts and visits.
- **February 2026** (grade C [8, 2]): The home page now reads 'AI Workspace For Architects'. On 11 February the first YC launch post, 'Avoice: The AI workspace for architects', says firms manage $300M+ in active projects on it.
- **8 March 2026** (grade C [3]): Second YC launch post, 'Harvey for Architecture', in the Winter 2026 batch: firms in 5 countries, over $300M in construction projects.
- **July 2026** (grade C [8]): The home page says 'Trusted by 250+ practices and in-house design teams'.
- **November 2026** (grade C [4, 5, 1]): The site is live with published prices in pounds, an offer of up to 12 months free for practices switching from other specification software, and 7 people on the YC page.

## Why did Avoice work?

### One painful document, in one industry

Specifications carry contractual weight and take weeks to write by hand, the company says. Avoice starts from that one document, built on the practice's own office master and drawings, and adds the neighbouring work (drawing checks, submittals, compliance records) around it.

### Priced per specification writer

The pricing page charges for the people who write specifications, not for everyone in the office, with cheaper seats for people who only use project tools or timesheets. A small practice can start at the Solo plan.

### Switching offer against incumbents

The site offers up to 12 months free on an annual plan to practices that already pay for specification software, aimed at moving customers from the older tools that the about page criticises for lock-in.

## How it was built

Few build details are public. These come from the company's own pages.

- Project data is stored in the AWS UK region on every plan, with encryption in transit and at rest.
- Third-party AI model providers process prompts under zero-data-retention terms; the pages read here do not name them.
- Connectors for Revit, ArchiCAD and Vectorworks (building design programs) and for Xero and QuickBooks (accounting); Pro and higher plans can connect outside AI tools through MCP, a standard protocol for giving AI assistants access to data.
- UK and Irish building regulations are built in, with calculators such as stair, ventilation and overheating checks.

Sources: [7, 5, 1, 4]

## Who tried this before Avoice, and why did they fail?

Three companies in our database of failed startups tried to change how buildings are designed and built, and failed. The values below are from that database and are not independently verified.

The failed startups come from our database of dead startups, retold here in our own words; Its entries are AI-assisted summaries of public sources, so they carry no evidence grade.

### Katerra (2015 to 2022; funding US$2.6B; cause: Unit Economics)

- Promise: One company for the whole building process, from architecture and design to factories and construction.
- Why it died: It built factories and supply chains before it had the demand, and the losses outran even SoftBank's money.
- Record: 

### Social Construct (2017 to 2020; funding US$17M; cause: Ran Out of Cash)

- Promise: Technology and streamlined processes to build housing faster and cheaper.
- Why it died: Physical construction scaled slowly, regulation was complex, and the pandemic hit before more money came.
- Record: 

### Veev (2008 to 2024; funding US$647M; cause: Unit Economics)

- Promise: Factory-made wall panels with built-in services, assembled on site in days.
- Why it died: Premium homes for a market that buys on price, and a costly factory when higher interest rates cut demand.
- Record: 

## What changed

The three predecessors tried to change the physical building: factories, panels and their own construction crews, which needed hundreds of millions of dollars before the first sale. Avoice changes only the paperwork of the people who design the building and leaves construction to the existing industry.

That makes it a software business with low marginal cost per customer. The risk has moved from factories to adoption: architects must trust AI-drafted clauses that carry contractual weight, and the pricing page says the practice stays responsible for every specification it issues.

## Can one person copy Avoice now?

**Verdict: Hard for one person; it needs deep domain knowledge.**

The idea of taking one long, rule-heavy professional document and drafting it from a firm's own past work fits many industries. Avoice's founders spent years with architects first, the launch post says, and the product depends on national standards, regulation libraries and design-software connectors.

1. Pick one long document that a profession writes by hand on every job and that follows written standards.
2. Build drafting on the customer's own past documents, so the output uses their wording.
3. Add checks against the source drawings or data, because a professional signs the result.
4. Price per writer, and offer a switching deal to customers of the incumbent software.

**What is still open.** Other professional documents built from standards and past work: engineering calculations reports, tender packs for contractors, operation and maintenance manuals, planning applications.

## What could go wrong for Avoice?

- **What is not verified.** No revenue figure was found. The headline is the company's own home-page claim of '250+ practices', unchanged since July 2026, and the US$300 million figure is the value of customers' construction projects stated by the founders, not revenue. No payment-processor profile, founder interview with revenue, or filing was found. A reader could look for a funding announcement with traction figures or a case study by a named practice.
- **A different product on the same domain in 2025.** In the Internet Archive copy of 28 November 2025, avoice.co showed 'AVoice', a sales intelligence product for sales reps that captured 'calls, texts, and visits' and offered 'real-time visibility into on-site activity'. The pages read in 2026 sell only the architecture workspace; no source explains the change.
- **Customer claims.** The home page shows four named testimonials, including a senior architect at Marriott International, and the YC description mentions firms of several hundred people. None of these could be checked with the customers.
- **Competition and model providers.** On this site the closest stories are Fenestra and Archifruits (AI renders for architects) and Blueprint Crusher (AI reading of construction tender documents); Avoice works on the written specification instead. The security page says it uses third-party AI model providers under zero-data-retention terms but does not name them, so the dependence on any one provider could not be checked.
- **Team and funding.** Two founders started it and the YC page lists 7 people in November 2026; the about page names YC and four other investors without amounts. This fits the site's rule for funded teams of 6 to 10 that began with 1 to 5 founders.

## Sources

1. Y Combinator company page: Avoice, AI-native workspace for AEC — https://www.ycombinator.com/companies/avoice (grade C). Read in full, including the page data, downloaded by the pipeline on 6 November 2026. Source for the founders, founding year, team size, batch, location and company description.
2. YC launch post, 11 February 2026: Avoice: The AI workspace for architects — https://www.ycombinator.com/launches/PQC-avoice-the-ai-workspace-for-architects (grade C). Read in full in the launch data embedded in the YC company page. Source for the first launch date and the '$300M+ in active projects' claim.
3. YC launch post, 8 March 2026: Avoice: Harvey for Architecture — https://www.ycombinator.com/launches/PeO-avoice-harvey-for-architecture (grade C). Read in full in the launch data embedded in the YC company page. Source for the five-country claim and the founders' backgrounds.
4. Avoice home page — https://www.avoice.co/ (grade C). Read in full on 6 November 2026. Source for the '250+ practices' claim, the features and the testimonials.
5. Avoice pricing page — https://www.avoice.co/pricing (grade C). Read in full on 6 November 2026. Source for the plans, prices, billing terms and the responsibility statement.
6. Avoice about page — https://www.avoice.co/about-avoice (grade C). Read in full on 6 November 2026. Source for the investors and the company's view of incumbent software.
7. Avoice security page — https://www.avoice.co/security (grade C). Read in full on 6 November 2026. Source for AWS UK hosting, certifications and the model providers' data terms.
8. Internet Archive copies of avoice.co, 28 November 2025, 8 February 2026 and 29 July 2026 — https://web.archive.org/web/20260729100357/https://www.avoice.co/ (grade C). Read the three copies in full. Source for the earlier sales product, the switch to architecture and the July 2026 practice count.
9. US Federal Reserve H.10 Foreign Exchange Rates, release of 2 November 2026 — https://www.federalreserve.gov/releases/h10/current/default.htm (grade A). Read the United Kingdom row. Rate for 30 October 2026: US$1.3398 per pound.
10. Database of failed startups, local export — /method/#dead (grade C). Local export. AI-written summaries, not independently verified. Source for the failed predecessors.

Contact: aiolum@livyden.com. Run Avoice? Send corrections or a verified figure to aiolum@livyden.com (subject: Correction: Avoice).