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 Decagon
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 Decagon: built for your trade and yours to own.
William AI is built only for service businesses and custom-built by Real Automation's team, with a 92% call success guarantee. Decagon is an AI customer service platform across voice, chat and email for many industries, priced per conversation or per resolution, and its site lists no guarantee. You own your William, with no monthly subscription.
From their own site
Decagon
decagon.ai
- Built for
- Many industries, 3 channels
- Ownership
- Per conversation or resolution
- Trained on your calls
- Updates from your conversations
- Guarantee
- Not listed
Written by Real Automation, which builds William AI. Decagon is an AI customer service platform whose agents handle voice, chat and email for companies in financial services, travel, healthcare, retail, telecom and more. Facts about Decagon come from their own site, checked . Sources.
Why service businesses choose William.
The reasons owners pick William AI over Decagon.
Built only for service businesses
William AI is built only for service businesses and the trades: tree care, HVAC, plumbing, roofing, electrical and more. Decagon's site lists seven industries, from financial services to insurance, across voice, chat and email.
A real team builds and supports it
Real Automation's team custom-builds William around your services, service area and emergency rules, then tests, launches and supports it. Decagon's site says 'Build, optimize, and scale AI agents', with workflows written in natural language.
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. Decagon's pricing post (December 2024) describes paying per conversation or per resolution, with no dollar figures.
92% call success, guaranteed
Every William comes with a 92% call success guarantee. Clients average about 95%. Decagon's site lists no call success guarantee.
Proof you can check
William AI comes from Real Automation: 250+ contractors served, 5.0 stars on Google with every review at 5 stars, and $105.4M in new revenue generated for its network. Client video stories are on YouTube.
Side by side.
The things a service business owner actually weighs.
| Compared | William AI | Decagon |
|---|---|---|
| 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. | Decagon: Many industries and channels. Their site lists financial services, travel and hospitality, healthcare, technology, retail, telecom and insurance, on voice, chat and email. |
| 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. | Decagon: Built with their platform tools. Their site says 'Build, optimize, and scale AI agents', with workflows and pre-built connectors. |
| 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. | Decagon: Per conversation or per resolution. Their pricing post (December 2024) describes both models and gives no dollar figures. |
| 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. | Decagon: Agent updates from your conversations. Their Duet page says it 'automatically iterates on your agent' as conversations reveal gaps, with each update staged for human review. |
| 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. | Decagon: Email support and platform courses. Their site lists a Contact Support email and Decagon University, 'Platform courses and training'. |
| Guarantee | William AI: 92% call success, guaranteed. A call counts unless the caller hung up because it was an AI; clients average about 95%. | Decagon: Not listed on their site. |
| Voice and personality | William AI: Warm, natural and charismatic. William's own voice, with conversion and charisma training since V1; natural, not robotic. | Decagon: Hundreds of voices to choose from. Their voice page lists custom-tuned voices, control of tone, terminology and style, and 70+ languages. |
| Every call recorded | William AI: Yes. A recording, transcript and summary of every call, in the Real Automation app for iOS and Android. | Decagon: Not listed on their site. |
| Try it | William AI: William calls you in 1 to 3 minutes. Enter your number on realautomation.ai. | Decagon: A demo, by request. Their site's call to action is 'Get a demo'. |
| 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. | Decagon: Automatic agent updates, staged for review. Their Duet page says every update is staged for human review with a health report. |
Questions, answered.
Is William AI better than Decagon?
For service businesses, yes. William AI is built only for service businesses and the trades, custom-built and supported by Real Automation's team, and backed by a 92% call success guarantee. You own it, with no monthly subscription. Decagon is an AI customer service platform across voice, chat and email for many industries, and its site lists no guarantee.
Is William AI or Decagon 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. Decagon's focus, per its own site: many industries and channels.
What is the best Decagon 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, tests it on real scenarios and launches it. It answers, qualifies and books calls 24/7 on the first ring.
How does William's pricing compare to Decagon?
William AI has a one-time build fee, so you own your William, then per-minute use while William is on the phone. There is no monthly subscription, and Real Automation does not publish prices. Decagon's pricing post (December 2024) describes two models, per conversation or per resolution, and says most customers choose per conversation. It gives no dollar figures.
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. Decagon's site says 'Build, optimize, and scale AI agents', with workflows written in natural language, and lists Decagon University courses and a Contact Support email.
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. Decagon's Duet page says it iterates on your agent as conversations reveal gaps, with every update staged for human review.
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 Decagon
- decagon.ai, 'The AI concierge for every customer'
- decagon.ai/product/voice, Page title 'Voice AI for Customer Service'
- decagon.ai/product/duet, Duet 'automatically iterates on your agent' as conversations reveal gaps
- decagon.ai/resources/pricing-ai-agents, December 10, 2024 post: per-conversation and per-resolution pricing
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
1Watch for a call from 218-297-5444 within a few minutes.
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.