00How we compare

We built the stack.
Nobody's reselling here.

Most of the “AI for service businesses” pitches landing in your inbox are agencies reselling a white-labeled CRM with their logo slapped on it. FieldStack is the opposite. Real backend, premium voice, per-trade calibration that bundled platforms can't match, and it works with the software you already run.

Run the Free Diagnostic See the stack

The two-line summary

We own every layer. Not white-labeling someone else's platform with a markup.
Works with your existing setup. Whatever FSM you run today, we read and write to it.
Voice you can hear the difference in. Premium TTS tuned for the trade, with the vendor disclosed under DPA before you commit.
Tuned per trade. HVAC vocabulary isn't plumbing vocabulary isn't roofing vocabulary.

06Built different

Most “AI for service businesses” is rented.
We built ours.

The agencies pitching you AI are mostly reselling the same white-labeled CRM with a logo swap. We built FieldStack from the ground up — premium voice infrastructure, per-trade tuning, and integration with your existing setup that generic platforms can't match.

What matters

FieldStack

Built infrastructure

Generic AI Agency

White-labeled CRM

DIY / In-House

Zapier + GPT

Voice quality

What your customer hears when the AI picks up

Premium TTS, tuned per shop

Templated, generic voice

Robotic / off-the-shelf

Works with your current setup

Whether you need to switch software to start

Yes — no software changes required

No — requires their stack

Varies

Tuned per trade

Industry-specific vocabulary and benchmarks

Yes

Real-time voice latency

Round-trip time on a live call

Under 800ms

2-5 seconds typical

N/A

Backend ownership

Who built and runs the infrastructure

Built from scratch

White-labeled SaaS

Glue scripts

24/7 production reliability

Always on, never sleeps

Yes

Partial

Time to live

From signed quote to first AI-booked job

~14 days, typical

4-8 weeks setup

Months of DIY

Cancel anytime

30 days notice, data export, no penalty

Yes

We can show you the actual stack and walk you through how the integrations work in plain English.

See the full breakdown Run the diagnostic

02Under the hood

The actual stack
we built FieldStack on.

No white-labeled CRM. No reseller markup. No fragile glue scripts. We picked the best component at every layer and built our own infrastructure on top.

Layer 01LLM provider

The brain

Frontier LLM

Industry-leading reasoning model handles every customer interaction, every routing decision, every personalized message. Prompt caching cuts cost per call. Specific provider disclosed under DPA pre-purchase.

Layer 02STT provider

The ears

Real-time speech-to-text

Real-time STT under 300ms. Tuned for trade vocabulary — knows the difference between "condenser" and "compressor." Provider disclosed under DPA pre-purchase.

Layer 03TTS provider

The mouth

Premium voice synthesis

Premium TTS with natural inflection. Tuned per shop — pick a warm female voice, a mature male voice, regional accent. Demos before launch. Provider disclosed under DPA pre-purchase.

Layer 04Twilio

The phone line

Twilio (or OpenPhone / RingCentral)

Phone provisioning, call routing, SMS, MMS, recording. Caller always sees your number on caller ID — never ours. 99.95% uptime SLA.

Layer 05Integrations

The hands

System integrations

Real-time read/write into your existing tools, webhook-driven events, no manual sync. Configured during onboarding based on what you already run.

Layer 06Supabase

The memory

Supabase + pgvector

PostgreSQL with vector search for customer context, conversation memory, and per-shop tuning. Row-level security on every table. Encrypted at rest and in transit.

03What this means for you

Translated from engineering to operator language.

What does "built infrastructure" actually mean for me?: Your AI doesn't break when GHL or some upstream platform pushes an update. We control the full stack, so when something needs to change we change it. When an upstream tool ships a new API version, we adapt within days. You're never sitting on hold while a third party decides whether to fix your problem this quarter.
Why does real-time system integration matter vs. webhook glue?: Picture a 14-truck HVAC shop in July. Caller has no AC and a baby in the house. Your receptionist is already on another line. Real-time integration means the agent reads the live schedule, sees a tech wrapping up an R-410A swap two zip codes away, and books the next slot before the caller hangs up. Webhook glue (or worse, Zapier bridges) means 1-15 minute delays per action, which kills a live booking. The difference is closing the caller who's still on the phone instead of losing them to whoever calls back first.
How do I know your voice quality is actually better?: Two demos during your strategy call. One of generic platform voice AI (the kind GHL agencies resell), one of FieldStack tuned for your trade. You'll hear it in 30 seconds. If you can't, we won't take you as a customer.
What does "tuned per trade" buy me in practice?: An HVAC receptionist that knows what R-410A means and doesn't ask the caller to spell it. A plumbing agent that flags a main line backup as urgent and pushes a hydro-jetting slot. A roofing agent that hears "hail damage" and routes it as an insurance lead instead of a tear-off estimate. Generic platforms give you generic prompts. We calibrate the vocabulary, the urgency triage, and the booking logic to the trade.

Want proof before you commit?

The diagnostic shows you exactly what we'd build for your shop, with dollar estimates per leak and the specific agents we'd install. About 45 minutes, no card required.

Run the Free Diagnostic See a sample report See the pricing

We built the stack. Nobody's reselling here.

Most “AI for service businesses” is rented.We built ours.

The actual stack we built FieldStack on.