Better for service businessesBetter choice
William AI
by Real Automation · 5.0 on Google
- Built for
- Service businesses only
- Ownership
- You own it, no subscription
- Trained on your calls
- Yes, never shared or sold
- Guarantee
- 92% call success
5.0 Google Reviews
William AI vs Dasha
The better choice for service businesses. An AI receptionist built for the trades, owned by you, and guaranteed.
Hear William call youFor service businesses, William AI is the better choice over Dasha: built for you by a real team.
William AI is an AI front desk, custom-built by Real Automation's team for your service business, and yours to own. Dasha is a voice AI platform for developers, billed per minute with phone and AI model costs passed through, and its support depends on the plan. William guarantees 92% call success.
From their own site
Dasha
dasha.ai
- Built for
- Built for developers
- Ownership
- Per minute, from $0.08/min
- Trained on your calls
- Uses documents you upload
- Guarantee
- No call success guarantee listed
Written by Real Automation, which builds William AI. Dasha is a voice AI platform for developers to build, test and run their own voice agents for phone calls, using a dashboard or API. Facts about Dasha come from their own site, checked . Sources.
Why service businesses choose William.
The reasons owners pick William AI over Dasha.
Built for you by a real team
Real Automation's team custom-builds William around your services, service area, questions and emergency rules. You never write prompts or wire up tools. Dasha's docs describe building agents yourself in a dashboard or through the API.
Built only for service businesses
William AI is built only for service businesses and the trades: tree care, HVAC, plumbing, roofing, pest control, auto repair and more. Dasha's homepage calls it a 'Voice AI platform for developers'.
You own it, no monthly subscription
You own your William: a one-time build fee, then per-minute use while William is on the phone. No monthly subscription. Dasha bills per minute, from $0.08/min on Growth (their pricing page, November 2026), with phone and AI model costs passed through.
Trained on real service calls
The William Engine V2 has learned from real calls across hundreds of service businesses, in private, secure environments. Your data is never shared or sold. Dasha's Knowledge Base uses documents you upload.
92% call success, guaranteed
Every William comes with a 92% call success guarantee. Clients average about 95%. Dasha's pricing page lists a 99.99% uptime target and no call success guarantee.
5.0 on Google. Every review, five stars.
Owners who run on William rate Real Automation five stars. Hear it from them in their own words.
Side by side.
The things a service business owner actually weighs.
| Compared | William AI | Dasha |
|---|---|---|
| Built for | William AI: Service businesses only. Tree care, HVAC, plumbing, roofing, electrical, pest control, auto repair and more, with one job: answering, qualifying and booking calls, 24/7, on the first ring. | Dasha: Developers building voice AI. Their homepage says 'Voice AI platform for developers'. |
| Who builds it | William AI: Real Automation's team, for you. They build William around your services, service area, questions and rules, test it on real scenarios and launch it. | Dasha: You build it yourself, in their dashboard or through their API. Their docs say to 'pick a voice, choose an AI model' in the dashboard. |
| Ownership and pricing | William AI: You own it. A one-time build fee, then you pay only for the minutes William is on the phone, like buying the car and paying for gas. No monthly subscription; pricing is set on a call with the team. | Dasha: Per minute, from $0.08/min on Growth (their pricing page, November 2026). Phone and AI model costs pass through at your negotiated rates; a free Developer tier includes 1,000 minutes. |
| Trained on your calls | William AI: Yes, in private. William is trained on real calls in private, secure environments, and your data is never shared or sold. | Dasha: Uses documents you upload. Their Knowledge Base feature says to upload documents and 'your AI pulls relevant context automatically'. |
| Support | William AI: A real team. Real Automation builds, launches and supports your William, and you can book a call with the team any time. | Dasha: Depends on the plan. Their pricing page lists email support on Developer and priority support via a private channel on Growth. |
| Guarantee | William AI: 92% call success, guaranteed. A call counts unless the caller hung up because it was an AI; clients average about 95%. | Dasha: No call success guarantee listed. |
| Voice and personality | William AI: Warm, natural and charismatic. William's own voice, with conversion and charisma training since V1; natural, not robotic. | Dasha: You set up the voice yourself. Their docs say to 'pick a voice', and their homepage lists voice cloning and 30+ languages. |
| Every call recorded | William AI: Yes. A recording, transcript and summary of every call, in the Real Automation app for iOS and Android. | Dasha: Recordings and transcripts are listed. Their homepage lists call recordings, and their docs say 'Every conversation saved and searchable.' |
| Try it | William AI: William calls you in 1 to 3 minutes. Enter your number on realautomation.ai. | Dasha: A free Developer tier. Their pricing page lists 1,000 free minutes, no card required, and one concurrent call. |
| Upgrades | William AI: Overnight, for every client. William runs on the William Engine, Real Automation's own voice AI engine; V3 arrives free for V2 clients by January 1, 2027. | Dasha: You compare versions before deploying. Their homepage lists version comparison testing: 'Compare old vs new app behavior before deploying.' |
Questions, answered.
Is William AI better than Dasha?
For service businesses, yes. William AI is custom-built, tested and launched by Real Automation's team, you own it with no monthly subscription, and 92% call success is guaranteed. Dasha is a voice AI platform for developers: its docs describe building agents yourself in a dashboard or through the API, and its pricing page lists no call success guarantee.
Is William AI or Dasha better for a plumbing or HVAC company?
William AI. It is an AI receptionist built only for service businesses and the trades, including HVAC, plumbing, roofing, electrical, tree care, pest control and auto repair, and Real Automation's team builds it around your services, service area, questions, booking and emergency rules. You own it with no monthly subscription, and 92% call success is guaranteed. Dasha's focus, per its own site: developers building voice AI. Their homepage says 'Voice AI platform for developers'.
What is the best Dasha alternative for service businesses?
William AI by Real Automation. It is an AI front desk built only for service businesses and the trades, from tree care and HVAC to plumbing and roofing. Real Automation's team custom-builds each William around your services, service area and booking rules, so you get a front desk built for you, not a platform to build on. It answers and books calls 24/7 on the first ring.
How does William's pricing compare to Dasha?
William AI has a one-time build fee, so you own your William, then per-minute use while William is on the phone. Real Automation's team builds it for you, and there is no monthly subscription. Real Automation does not publish prices. Dasha's pricing page (November 2026) lists a free Developer tier with 1,000 minutes and Growth from $0.08/min, billed by the second, with phone and AI model costs passed through at your negotiated rates.
Who builds and supports William?
William AI is built, tested, launched and supported by Real Automation's team. You never write prompts, pick voices or wire up tools, and you can book a call with the team at https://realautomation.ai/#book. Dasha's docs describe creating agents yourself in its dashboard or through its API, and its pricing page splits support by plan: email on Developer, a private priority channel on Growth.
Is William trained on my calls?
Yes. William AI is trained on real calls in private, secure environments, and your data is never shared or sold. The William Engine V2 has learned from real calls across hundreds of service businesses. Dasha's homepage lists a Knowledge Base where you upload documents for the AI to pull context from.
Can I hear William before I buy?
Yes. Enter your phone number on realautomation.ai and William calls you in 1 to 3 minutes. Try it at https://realautomation.ai/pages/ai-receptionist#demo, or book a call with the team at https://realautomation.ai/#book.
More comparisons
Sources for Dasha
- dasha.ai, 'Voice AI platform for developers'
- dasha.ai/pricing, Developer (free, 1,000 minutes, one concurrent call
- blackbox.dasha.ai/docs, Dashboard: 'Tell it what to say, pick a voice, choose an AI model'
Checked . Product names are trademarks of their owners; see each company's site for current details. William AI's Google rating: Real Automation's Google Business Profile, November 2026.
$105.4M
in new revenue generated for our network and counting.
250+
Contractors Served
The William Engine.
William isn't a voice you pick and a prompt you write. He runs on our own engine, built, owned and improved by Real Automation, and every client gets the upgrades.
-
V1Where William started.
Proved a phone call with an AI could feel personal.
-
V2Running every William today.
Tested on real client calls, then delivered to every V1 client overnight. Results jumped the next morning.
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V3Coming free to every V2 client.
Our fastest, most personal engine yet. In production beta on real calls now, and every client gets it.
An employee you own.
You don't rent a bot or wire up a platform. You own your William and everything he learns about your business.
Upgrades while you sleep.
Like an update on your phone, new engine versions reach every William overnight. Nothing to rebuild.
Trained on real calls.
William keeps learning from real conversations in private, secure environments. We never share or sell your data.
Real Automation designs, builds and owns the William Engine. We never white-label, resell or license it.
Hear William call you.
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What to do next
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2Pick it up when it rings.
3Talk to William like you are talking to a real front desk.
Talk to the team.
Pick a time that works for you. 45 minutes with the people who build William.