Vapi, Retell, Synthflow: should you build your own AI receptionist?
These platforms are excellent infrastructure — the whole market is built on comparable blocks. The question isn't their quality: it's who, at your business, will design, test, maintain and monitor the agent. Here's the honest math.
The basics
Platform and product: two different jobs
The math
Build (DIY) vs buy (Nova)
'DIY' = an agent assembled on Vapi, Retell or Synthflow, by you or an agency. Per-minute billing typical of the model.
| Build (DIY platform) | Buy (Nova) | |
|---|---|---|
| Software cost | Per minute — grows with your success | $199 CAD/mo, flat |
| Who designs and tests the agent | You or your agency | Our team |
| Who maintains it at every menu change | You or your agency | Our team |
| Time to go live | Days to weeks | 24 hours |
| Complete orders + SMS + dashboard | Built piece by piece | Included, already wired |
| Robust FR/EN bilingualism | Yours to design and test | Native, in production |
| Call quality control | Yours to build | Proprietary system included |
| Total control over every detail | Yes — DIY's real advantage | Configurable, not programmable |
| Money-back guarantee | — | 14 days, all plans |
When building is the right choice
If you have a developer, a use case nobody covers, and the appetite to iterate without depending on a vendor — build. These platforms are powerful, their docs are excellent, and total control is a real advantage. We've been there ourselves: Nova exists because we did that assembly, testing and quality-control work — full time, for months.
Which is exactly why we can tell you: for a restaurant that just wants it to work, that work isn't your job. It's ours.
What you're really buying
Not an answering machine: the complete loop
FAQ
Frequently asked build-vs-buy questions
What's the difference between Vapi/Retell/Synthflow and Nova?
Vapi, Retell and Synthflow are infrastructure platforms: they give you the building blocks (telephony, voice, language model) and you assemble your agent yourself — prompts, logic, integrations, testing, maintenance. Nova is a finished product: a restaurant/SMB-specialized receptionist, configured by our team, with orders, SMS and dashboard already wired.
How much does an agent built on a DIY platform cost?
Billing is per minute (typically $0.05 to $0.30 USD/min depending on your stack), plus telephony, plus your build-and-maintain time — or the fees of the agency doing it for you. The software cost looks low; the total cost depends entirely on who does the work.
An agency offers me an agent built on Vapi — is that reliable?
It can be. The right questions: who maintains the agent when your menu changes? What happens if the agency folds? Is the per-minute price capped? Is there an operational dashboard, SMS confirmation, a guarantee? An agent assembled in days can answer calls fine — it's depth (complete orders, real bilingualism, quality control) that separates a product from a demo.
When is building it yourself the right choice?
If you have an in-house developer, a genuinely atypical use case finished products don't cover, and the appetite to iterate yourself — DIY platforms are remarkable and full control has real value. For a restaurant or clinic that just wants the phone answered and orders taken: buy finished, judge it for 14 days.
The finished result
Hear what 'finished' sounds like
Call 506-712-0056: Nova takes your order, in French or English. Zero prompts to write — live in 24h, 14-day guarantee.