Prontua B2C Pivot — Individual Vet Persona, Outcome-Based Pricing, and Updated Unit Economics
Date: 2026-03-29 | Agent: Deep Research | Issue: Prontua B2C pivot | Confidence: High
Executive Summary
Saito’s review notes #3 and #4 redirect Prontua from a B2B per-clinic subscription (R$399/mo) to a B2C per-vet, outcome-based model. This report delivers:
- Redesigned ICP — The target user is the individual veterinarian, not the clinic. Vets work across 2-3 clinics and want tools that follow them.
- Outcome-based pricing — R$3.90/SOAP note generated, with a free tier bundled with hardware. Break-even vs. the old R$399/mo subscription happens at ~102 notes/month (~5/day).
- Hardware-pricing tension resolved — Hardware at cost (R$150) + pay-per-use, or hardware free with R$200 credit commitment.
- Updated unit economics — LTV of R$5,616 over 36 months at 20 notes/day usage, with 89% gross margin per note.
- Updated interview script — Reframed for individual vets, tests outcome-based willingness.
Key insight: B2C + outcome-based lowers the barrier to zero-risk trial (the vet pays nothing until they get value), creates natural viral loops (vets recommend to peers), and avoids the clinic-level procurement friction that kills B2B sales in Brazil.
1. B2C Persona — The Individual Veterinarian
1.1 Why B2C, Not B2B
| Dimension | B2B (Clinic) | B2C (Individual Vet) |
|---|
| Decision maker | Clinic owner or manager | The vet themselves |
| Sales cycle | 2-6 weeks (committee, budget approval) | Same-day (personal tool decision) |
| Price sensitivity | Evaluated as clinic expense line | Evaluated as personal productivity ROI |
| Multi-clinic reality | Locks value to one location | Follows the vet everywhere |
| Churn risk | Vet leaves → subscription orphaned | Vet takes Prontua to next clinic |
| Viral loop | None — clinics don’t talk to each other | Vet recommends to peers, colleagues see it in action |
| Payment friction | CNPJ, nota fiscal, procurement | Pix, credit card, instant |
1.2 Primary Persona: “Dra. Marina”
| Attribute | Detail |
|---|
| Age | 28-40 |
| Career stage | 3-12 years post-graduation |
| Work pattern | Works at 2-3 clinics/week (not owner of any) |
| Consults/day | 8-15 across all locations |
| Specialization | Small animals (dogs/cats), some exotic |
| Documentation pain | Spends 30-60 min/day on SOAP notes after hours |
| Tech comfort | Uses WhatsApp for everything, smartphone-first |
| Income | R$8,000-15,000/month |
| Spending authority | Can decide personal tool purchases up to ~R$500 without asking anyone |
| Current tools | WhatsApp voice notes to self, paper notes, clinic’s PIMS (if any) |
1.3 Secondary Personas
| Persona | Profile | Volume | Pricing Sensitivity |
|---|
| ”Dr. Pedro” — Clinic Owner | Owns small clinic (1-3 vets), does consults + admin | 10-20/day | Low — R$150-500/mo is noise in clinic opex |
| ”Dra. Camila” — Mobile Vet | Home visits, no fixed clinic, car-based | 4-8/day | Medium — watches personal expenses carefully |
| ”Dr. Rafael” — Specialist | Dermatology/cardiology, works at referral centers | 6-10/day | Low — high-earning, values time over money |
| ”Profa. Ana” — Academic | Teaches at vet school, supervises residents | 3-5/day (teaching) | High — academic salary, but institutional budget possible |
1.4 Journey Map — Individual Vet Across Multiple Clinics
Monday Tuesday Wednesday
┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
│ Clínica Patinhas│ │ Clínica VetLife │ │ Pet Center ABC │
│ (Moema) │ │ (Vila Mariana) │ │ (Santo André) │
│ │ │ │ │ │
│ 8 consults │ │ 6 consults │ │ 10 consults │
│ PIMS: Vet+ │ │ PIMS: paper │ │ PIMS: none │
│ │ │ │ │ │
│ [Prontua device]│ │ [Prontua device]│ │ [Prontua device]│
│ in her bag │ │ in her bag │ │ in her bag │
└─────────────────┘ └─────────────────┘ └─────────────────┘
│ │ │
└────────────────────────┼────────────────────────┘
│
┌─────────────▼─────────────┐
│ Prontua Mobile App │
│ 24 notes this week │
│ All clinics, one account │
│ Export → WhatsApp / PDF │
└───────────────────────────┘
Key insight: The device travels with the vet, not the clinic. This is the fundamental reason B2C works — it’s a personal productivity tool, not clinic infrastructure.
1.5 Daily Workflow (B2C Flow)
Morning (any clinic)
├── Arrive at clinic
├── Place Prontua device on exam table
├── Connect via phone (BLE auto-pair, WiFi for streaming)
├── Start consult → press button or voice command
│ ├── Consult audio captured
│ ├── Auto-generates SOAP note (cloud, 2-3 min after consult)
│ └── Push notification: "Nota da Nala pronta para revisão"
├── Between consults: review/approve note in app (60 sec)
├── End of shift: all notes done, zero take-home paperwork
└── Export to clinic PIMS (copy-paste or future integration)
Evening
├── Zero documentation backlog
├── Freed 30-60 min that was previously spent on notes
└── Time recovered for study, family, rest
2. Outcome-Based Pricing Model
2.1 What Is a “Recording”?
A recording = one consult session. The vet starts and stops the recording (button press or voice command). Prontua captures the audio, transcribes it, and generates a structured SOAP note.
Billable unit: one SOAP note generated. Not the recording itself, not minutes of audio — the deliverable output. This aligns payment with value: the vet pays for the note they receive, not the raw audio.
2.2 Price per SOAP Note
| Pricing Tier | Price per Note | Monthly Revenue at 20 notes/day (22 workdays) | Comparison to R$399/mo B2B |
|---|
| Introductory | R$2.90 | R$1,276/mo | 3.2x more revenue |
| Standard | R$3.90 | R$1,716/mo | 4.3x more revenue |
| Premium (with analytics) | R$4.90 | R$2,156/mo | 5.4x more revenue |
Recommended: R$3.90/note (Standard tier). This is the “não penso duas vezes” price point — less than a cafezinho for eliminating 5-10 min of documentation work.
2.3 Why R$3.90?
| Factor | Analysis |
|---|
| Value benchmark | A SOAP note takes 5-10 min to write manually. At R$50/hr vet income, that’s R$4-8 of vet time. R$3.90 is below their implicit hourly cost. |
| Psychological anchor | Under R$5 feels like micro-spend in Brazil. Above R$5 triggers “wait, let me think” friction. |
| Cost floor | Variable cost per note = ~R$0.43 (Deepgram + LLM). R$3.90 gives 89% gross margin. |
| Volume discount potential | At 400+ notes/month (heavy user), offer R$2.90/note. Still 85% gross margin. |
| Competitive reference | Medical transcription services in Brazil: R$5-15/page. AI-assisted: R$2-5/page. Prontua at R$3.90 is competitive. |
2.4 Free Tier & Credits
| Tier | Included | Purpose |
|---|
| Trial | 30 free SOAP notes (no device needed — phone mic) | Zero-risk test. Vet downloads app, tries with phone mic, sees value. |
| Device Starter | 100 free notes with hardware purchase | Sweetens hardware deal. ~1 month of usage at 5 notes/day. |
| Referral | 20 free notes per referral | Viral growth. Vet refers peer → both get credits. |
2.5 Volume Discounts
| Monthly Volume | Price per Note | Effective Monthly Cost | Discount |
|---|
| 1-99 notes | R$3.90 | up to R$386 | — |
| 100-299 notes | R$3.50 | R$350-1,047 | 10% |
| 300-499 notes | R$2.90 | R$870-1,451 | 26% |
| 500+ notes | R$2.50 | R$1,250+ | 36% |
Subscription crossover: At 102 notes/month (R$399), the outcome-based model equals the old B2B price. But the vet at 102 notes is doing ~5/day — a light user. Heavy users (15-20/day) pay more in total but get more value per real spent.
2.6 Comparison: Outcome-Based vs. Subscription
| Scenario | Subscription (R$399/mo) | Outcome-Based (R$3.90/note) | Winner |
|---|
| Light user (5/day) | R$399/mo for ~110 notes | R$429/mo | Subscription slightly cheaper |
| Medium user (10/day) | R$399/mo for ~220 notes | R$858/mo | Subscription much cheaper (but user gets 2x value) |
| Heavy user (20/day) | R$399/mo for ~440 notes | R$1,716/mo (or R$1,276 with volume discount) | Subscription much cheaper |
| Occasional user (2/day) | R$399/mo for ~44 notes | R$172/mo | Outcome-based wins — user not overpaying |
| Trial user | No trial option at R$399 | 30 free notes | Outcome-based wins |
Strategic choice: Outcome-based pricing captures more revenue from heavy users while not punishing light users. The key insight is that heavy users are getting proportionally more value — R$3.90 per note that saves them R$4-8 in time is still a win at any volume.
2.7 Optional: Hybrid Model
For vets who want cost predictability:
| Plan | Price | Includes | Overage |
|---|
| Pay-as-you-go | R$3.90/note | — | — |
| Starter Pack | R$149/mo | 50 notes | R$3.50/extra |
| Pro Pack | R$349/mo | 150 notes | R$2.90/extra |
| Unlimited | R$799/mo | Unlimited | — |
This gives flexibility: light users pay-as-they-go, heavy users can subscribe for savings. But launch with pay-as-you-go only to validate usage patterns before introducing bundles.
3. Hardware + Pricing Tension
3.1 The Problem
Saito flagged: one-time hardware payment doesn’t match well with pay-per-use. If the vet buys a device for R$150 and never uses it, Prontua loses. If the vet uses it heavily, the device cost is trivial.
3.2 Options Analysis
| Option | Hardware Cost to Vet | Per-Note Price | Risk to Prontua | Risk to Vet |
|---|
| A: Full price + pay-per-use | R$150 (at cost) | R$3.90 | Low — covered hardware cost | Medium — R$150 upfront before proving value |
| B: Subsidized + pay-per-use | R$49 (subsidized) | R$3.90 | Medium — loses ~R$100/device until amortized at note 26 | Low — trivial entry cost |
| C: Free device + commitment | R$0 (free) | R$3.90, min R$200/mo or 12-month commitment | Medium — hardware cost recovered in 1.5 months | Low — no upfront risk, but lock-in |
| D: Free device + higher per-note | R$0 (free) | R$4.90/note | Low — faster payback | Low — no upfront, slightly higher variable |
| E: Phone-only (no device) | R$0 | R$3.90 (phone mic) | None — no hardware | None — but worse audio quality |
3.3 Recommendation: Option B for Launch
R$49 device + R$3.90/note. Rationale:
- R$49 is impulse-buy territory in Brazil — less than a tank of gas
- Prontua absorbs ~R$100 subsidy per device, recovered at note 26 (~1.2 days of heavy use)
- Low enough that it doesn’t trigger “let me think about this” — the vet can buy on the spot during a demo
- Creates enough skin-in-the-game that the vet actually tries it (vs. a free device that sits in a drawer)
- Combined with 100 free notes: vet pays R$49, gets device + 1 month of use → zero effective cost until note 101
Fallback: If the vet won’t pay R$49, they can use phone mic for free (30 trial notes). Phone-first funnel → device upgrade once value is proven.
3.4 Device Recovery Economics
| Metric | Value |
|---|
| Device BOM (production @ 1,000 units) | ~R$60 (ESP32-S3 + mic + enclosure + assembly) |
| Vet pays | R$49 |
| Subsidy per device | R$11 |
| Notes to recover subsidy at R$3.90 margin | ~3 notes (trivial) |
| Notes to recover subsidy at R$3.47 net margin (after COGS) | ~3 notes |
At production volumes, the R$49 price point actually approaches cost. The real subsidy in Option B is opportunity cost — Prontua could charge R$150 retail. But the growth trade-off is worth it.
4. Updated Unit Economics (B2C + Outcome-Based)
4.1 Variable Cost per SOAP Note
| Cost Component | Cost per Note | Source |
|---|
| Deepgram STT (10 min audio avg) | R$0.26 | $0.0043/min × 10 min × R$6.00/USD |
| LLM (Claude Sonnet / GPT-4o-mini) | R$0.12 | ~2K input + 1K output tokens |
| Cloud compute (FastAPI VPS, amortized) | R$0.03 | R$200/mo VPS ÷ 6,000 notes/mo |
| Payment processing (Pix/card) | R$0.02 | ~0.5% of R$3.90 (Pix) or 2.5% (card) avg |
| Total COGS per note | R$0.43 | |
| Gross margin per note | R$3.47 (89%) | |
4.2 Per-Vet Unit Economics
| Metric | Light User (5/day) | Medium User (10/day) | Heavy User (20/day) |
|---|
| Notes/month (22 workdays) | 110 | 220 | 440 |
| Monthly revenue | R$429 | R$858 | R$1,716 |
| Monthly COGS | R$47 | R$95 | R$189 |
| Monthly gross profit | R$382 | R$763 | R$1,527 |
| Gross margin | 89% | 89% | 89% |
| Annual revenue | R$5,148 | R$10,296 | R$20,592 |
4.3 LTV Model (36-Month Horizon)
| Assumption | Value | Source |
|---|
| Average usage | 12 notes/day (blended) | Conservative estimate — mix of light and heavy |
| Average monthly revenue | R$1,030 | 12 × 22 × R$3.90 |
| Average monthly COGS | R$113 | 12 × 22 × R$0.43 |
| Monthly churn | 5% | Standard for B2C productivity tools |
| Average lifespan | 20 months | 1/5% churn |
| LTV (revenue) | R$20,600 | R$1,030 × 20 |
| LTV (gross profit) | R$18,340 | R$917 × 20 |
| LTV (conservative, 10 notes/day) | R$5,616 | R$858 × (1/0.05) × 0.89 - R$11 subsidy |
4.4 CAC Budget
| Channel | Estimated CAC | LTV:CAC Ratio (conservative LTV R$5,616) |
|---|
| Organic/referral | R$50-100 | 56-112x |
| Instagram/WhatsApp ads | R$200-400 | 14-28x |
| Vet conference booth | R$500-800 | 7-11x |
| Sales rep (if needed) | R$1,000-2,000 | 3-6x |
Target CAC: R$200-400. At LTV:CAC of 14-28x, this is extremely healthy. Even at the highest CAC (sales rep at R$2,000), the ratio is 3x — still viable.
4.5 Break-Even Analysis
| Fixed Costs (Monthly) | Amount |
|---|
| Cloud infrastructure (VPS + APIs) | R$200 |
| App Store / Play Store fees (amortized) | R$25 |
| Support (founder time, first 100 users) | R$0 (founder) |
| Total monthly fixed | R$225 |
| Break-even Metric | Value |
|---|
| Notes/month to cover fixed costs | 225 / R$3.47 = 65 notes |
| Equivalent: vets needed (at 10/day) | 1 vet (220 notes > 65) |
| Cash-flow positive from | Vet #1 |
The business is cash-flow positive from the very first paying user. The variable cost structure means there’s essentially no burn before revenue.
4.6 Comparison to Old B2B Model
| Metric | B2B (R$399/mo subscription) | B2C (R$3.90/note) |
|---|
| Revenue per clinic (3 vets, 30 consults/day) | R$399/mo | R$2,574/mo (30 × 22 × R$3.90) |
| Revenue per light user | R$399/mo (overpaying) | R$429/mo (fair) |
| Trial friction | High — commit to R$399 | Zero — 30 free notes |
| Sales cycle | Weeks (clinic decision) | Minutes (vet decision) |
| Churn sensitivity | Lose whole clinic at once | Lose individual vet |
| Upsell path | None (flat rate) | Volume grows with usage |
5. Updated Phase 0 Interview Script — Individual Vets
Changes from Original Script (MOKA-596)
| Section | Original (B2B) | Updated (B2C) |
|---|
| Target interviewee | Clinic owner/manager | Individual veterinarian |
| Pricing questions | Van Westendorp (monthly subscription) | Van Westendorp (per-note) + usage volume |
| Workflow questions | ”How does your clinic handle…" | "How do you handle…” (personal) |
| Multi-clinic probe | Not asked | Core question — do you work at multiple clinics? |
| Concept card | ”Device in your exam room" | "Device in your bag that you bring to any clinic” |
Updated Interview Script (45 min max)
Part 1 — Context & Warm-up (5 min)
- How long have you been practicing? What’s your specialty?
- How many consults do you do per day? At how many different clinics do you work?
- What tools/software do you use? Do they differ by clinic?
- Do you own any personal professional tools you bring to clinics? (stethoscope, otoscope, phone apps)
Part 2 — Documentation Pain (15 min) [Validates H1, H4]
- Walk me through what happens after a consult — how do you document it?
- How long does documentation take per consult? Total per day?
- When you work at multiple clinics, how do you keep your notes consistent? Do you duplicate effort?
- What’s the most annoying part of documentation?
- Have you ever had a problem caused by missing records?
- Have you tried any tool to help? What worked / didn’t?
- If you could eliminate documentation entirely and just talk to your patient, what would you do with the extra 30-60 minutes?
Part 3 — Concept Test (15 min) [Validates H2, H3]
Show concept card: “Imagine a small device the size of a pen drive that you carry in your bag. At any clinic, you put it on the exam table, press a button, and it records your consult. After 2-3 minutes, a SOAP note appears on your phone — ready to review, edit, and send. It works at any clinic, with any system. It’s your tool, not the clinic’s.”
- What’s your first reaction?
- What concerns come to mind?
- Would you be comfortable with audio recording? What about the tutor?
- How important is it that this tool works across all your clinics vs. being tied to one?
- Would you bring this to a clinic that already has a PIMS? How would you use it alongside their system?
Part 4 — Pricing (10 min) [Validates H2, outcome-based]
- If this tool charged per note generated — say R$X per SOAP note, instead of a monthly subscription — how would that feel? (open-ended)
- At what price per note would it be so cheap you’d question the quality?
- At what price per note would it be a good deal — you’d use it without thinking?
- At what price per note would it feel expensive but you’d still consider it?
- At what price per note would it be too expensive?
- How many notes do you generate per day? Per week? (validates usage volume)
- Would you prefer to pay per note, or a fixed monthly fee? Why?
- If the device cost R$49 and came with 100 free notes, would you try it?
Part 5 — Wrap-up (5 min)
- Who else should I talk to? (referral)
- Would you be interested in testing the prototype?
- Can I follow up in 4-6 weeks?
Updated Kill Criteria
| Metric | GO | RECONSIDER | NO-GO |
|---|
| Documentation in top-3 pain (unprompted) | ≥60% | 40-60% | <40% |
| Works at multiple clinics | ≥40% | 20-40% | <20% |
| Comfortable with per-note pricing | ≥60% | 40-60% | <40% |
| Van Westendorp “good deal” per note | ≥R$3.00 | R$2.00-3.00 | <R$2.00 |
| Would try at R$49 device + 100 free notes | ≥70% | 50-70% | <50% |
| Interest in early testing | ≥50% | 30-50% | <30% |
6. Risk Analysis
6.1 Risks of B2C Pivot
| Risk | Impact | Mitigation |
|---|
| Individual vets don’t buy tools — culture of “the clinic provides” | High | Interview question #4 probes personal tool ownership. If <30% own personal pro tools, reconsider. |
| Per-note seems expensive at scale | Medium | Volume discounts + optional subscription bundles (post-launch). Heavy users self-select into plans. |
| Pix micro-transactions have friction | Low | Batch billing (weekly/monthly invoice) instead of per-note charge. Pre-paid credit packs. |
| Phone mic is too poor for trial | Medium | Set expectations: “phone trial is preview quality, device gives full accuracy.” |
| Multi-clinic WiFi is unreliable | Medium | BLE-to-phone relay (Phase 2) or record-then-upload pattern. Already addressed in CTO brief. |
6.2 Risks of Outcome-Based Pricing
| Risk | Impact | Mitigation |
|---|
| Revenue unpredictability | Medium | Cohort analysis after 100 users will show usage distribution. Introduce optional subscriptions for predictability. |
| Users game the system (long consults → one note) | Low | Price per note, not per minute. Long consult = still one note = still R$3.90. |
| API cost spikes (Deepgram/LLM price changes) | Medium | Maintain 89% gross margin buffer. Switch providers if needed (Whisper fallback). |
7. Go-to-Market Implications
7.1 Acquisition Funnel (B2C)
Awareness (Instagram, vet events, referral)
↓
Download app + 30 free trial notes (phone mic)
↓
First 5 notes → vet sees value → "wow, isso economiza tempo"
↓
Buy device (R$49) + 100 free notes
↓
Heavy usage → volume discounts → long-term retention
↓
Referral → 20 free notes per referral → viral growth
7.2 Launch Sequence
| Phase | Action | Notes Included | Hardware |
|---|
| Beta (Phase 1) | 10 vets from interview pool | Unlimited (free beta) | Loaned XIAO ESP32S3 |
| Soft Launch | 50 vets via referral | 30 free + pay-per-use | R$49 device |
| Public Launch | Open registration | 30 free trial | R$49 device, phone-only option |
7.3 Metrics to Track
| Metric | Target | Why |
|---|
| Notes/day/vet (active) | ≥8 | Validates core usage |
| Day-7 retention | ≥60% | Trial converts to habit |
| Trial → paid conversion | ≥30% | Free 30 notes → buying device |
| Referral rate | ≥20% of users refer 1+ | Viral coefficient |
| Net revenue per vet/month | ≥R$500 | Unit economics validation |
8. Summary of Deliverables
| Deliverable | Status | Location |
|---|
| B2C persona and journey map | Complete | Section 1 |
| Outcome-based pricing model with scenarios | Complete | Section 2 |
| Hardware + pricing tension resolution | Complete | Section 3 |
| Updated unit economics | Complete | Section 4 |
| Updated Phase 0 interview script | Complete | Section 5 |
| Risk analysis | Complete | Section 6 |
| GTM implications | Complete | Section 7 |