HeyLynx · WhatsApp Bot
Send invoices from WhatsApp. In your language.
You send a message — text, voice note, or photo. HeyLynx creates the invoice in your Zoho Books, sends you the PDF to review, and ships it to your customer. No laptop. No menu drilling in a foreign language.
TextType in WhatsApp the way you talk to anyone else.
VoiceHands dirty, driving, no keyboard? Send a voice note.
PhotoSnap a paper receipt, a notebook line, a Zelle screenshot.
Why it exists
Invoicing shouldn't stop your day
You open the laptop just to bill — when you could be lining up the next job.
You memorized an English-only software menu that changes every release.
A client asks for the invoice on Sunday night, and all you have is your phone.
How it works
Three ways in. One result out.
HeyLynx understands text, audio, and photos. It identifies you by your phone number, talks in your language, and creates the invoice in your Zoho Books.
You send on WhatsApp
Plain text, a voice note while you work, or a photo of a receipt. The bot identifies you by your number and loads your profile.
HeyLynx
online
send invoice $450 to Maria cleaning this month, due fridayThe bot fills the gaps
Finds the saved customer, reuses an existing item, and uses WhatsApp buttons to resolve ambiguity in one tap.
HeyLynx
online
Found Maria Pereira (Monthly Cleaning). Item Monthly residential cleaning — $450. Due Friday, May 15.✅ Create draft❌ CancelYou review the PDF and ship it
The bot creates a draft and sends the PDF in WhatsApp for you to check. Only after your green light does it dispatch to the customer.
HeyLynx
online
Invoice-2026-0142.pdf · previewsendSent to Maria's email. Status: Sent. ✅
What it does
What HeyLynx handles for you
Speaks 3 languages
Portuguese, Spanish, or English. Set once on your profile. Your customer receives the invoice in their language.
Text, voice, or photo
Voice transcription in ~1 second across PT/ES/EN accents. Receipt photos read and structured automatically.
Memory of your billing
Remembers the last 50 jobs. Spots patterns — Maria always $450 cleaning on the 15th — and pre-fills for confirmation.
Customer and item reuse
Searches inside your Zoho Books. No duplicate customers. No duplicate items. Address, email, and tax come pre-filled.
Review before send
Every invoice is a draft first. PDF previewed in WhatsApp. Nothing reaches the customer without your OK.
WhatsApp buttons and lists
Four customers named 'Silva'? The bot sends a tappable list — no typing, no scrolling.
Brake on weird amounts
If you usually bill $300–500 and type $5,000, the bot asks first. Cap of 10 invoices/day/customer. Auto kill switch.
Available 24/7
Runs on Cloudflare's global edge. Replies in seconds. Late night, weekends, holidays — bill whenever you need to.
Real cases
How people like you use it daily
Maria
Residential cleaning · Brockton, MA
- Before
- 12 recurring clients, 3 hours in Zoho every 1st of the month.
- After
- 12 voice notes in 8 minutes, while dropping her son at school.
Maria
HeyLynx
0:0812 drafts ready. Total $5,380. Want to review the PDFs?
João
Handyman · Providence, RI
- Before
- Took Zelle and forgot to send a formal receipt.
- After
- Photo of the Zelle in WhatsApp, paid invoice in 30s.
João
HeyLynx
📷 zelle-screenshot-280usd.jpg$280 receipt from Carlos Mendes via Zelle. Create the invoice as paid and send the receipt to the client?yes
Carlos
Hispanic food truck · Worcester, MA
- Before
- American customer asked for a formal invoice and his English froze.
- After
- Sends in Spanish, the bot ships it in English with the right tax address.
Carlos
HeyLynx
cobra Walmart Inc 200 dolares de catering jueves pasadoInvoice in English for Walmart Inc · $200 · catering 02/05/2026. Confirm?
Sunday, 10pm
Customer wants the invoice now
- Before
- Cracking open the laptop on Sunday night. Not happening.
- After
- WhatsApp text, invoice created and shipped in 90 seconds.
Sunday, 10pm
HeyLynx
send today's invoice to pedro almeida, $1200 electrical installDraft created. PDF below. Send now?
Why $597/month is worth it
You don't buy a bot. You buy your time back.
5–7h
Hours saved every month vs. building invoices by hand.
90 sec
From WhatsApp message to invoice in your customer's inbox.
0
Training. You already know how to use WhatsApp.
HeyLynx is one piece of Lynx+. You also get full monthly bookkeeping, monthly close, P&L, balance sheet, and WhatsApp replies under 4 hours — in Portuguese, Spanish, or English.
Where it lives
HeyLynx ships with the Lynx+ plan
The base Lynx plan covers full bookkeeping. Lynx+ adds HeyLynx — plus what you need to grow with controlled cash flow.
Full monthly bookkeeping
Lynx
includedLynx+
includedLynx Pro
includedCategorization and reports in 3 languages
Lynx
includedLynx+
includedLynx Pro
includedHeyLynx — WhatsApp bot for invoices
Lynx
not includedLynx+
includedLynx Pro
includedText + voice + photo on WhatsApp
Lynx
not includedLynx+
includedLynx Pro
includedRecurring customer memory
Lynx
not includedLynx+
includedLynx Pro
includedMulti-entity and 1:1 advisory
Lynx
not includedLynx+
not includedLynx Pro
included
Behind the bot
Serious tech. Human operation.
Anthropic Claude
Same AI used by Fortune 500 research teams. Understands your message in 3 languages.
WhatsApp Cloud API official
Meta's corporate channel. Not Z-API, not a personal contact number. Enterprise infrastructure.
Cloudflare Workers
Replies in milliseconds, 24/7, on the global edge. 99.99% uptime.
Zoho Books is the vault
You authorize via official OAuth and revoke whenever you want. HeyLynx executes — never replaces.
AES-256-GCM on tokens
Each Lynx Ledgers client has their own Zoho org with full isolation. Your data never touches another's.
Hard safety limits
10 invoices/day/customer, kill switch at $100/month of usage, double confirmation on anomalous amounts.
What it doesn't do
An invoicing tool. Nothing else.
Doesn't replace your bookkeeper — it serves the human Lynx Ledgers team.
Doesn't give financial advice or answer outside the invoicing scope.
Doesn't send unsolicited commercial messages — replies only when you message first.
Doesn't access other clients' Zoho — only your authorized organization.
Doesn't store PDFs locally — Zoho is the vault, always on demand.
Frequently asked
Common questions answered
Do I need a Zoho Books account already?
Yes. If you don't have one, Lynx Ledgers sets up your Zoho org during onboarding — no extra cost inside the Lynx+ plan.
What if I don't speak English?
The bot speaks Portuguese, Spanish, or English. You pick at signup. You can also issue an invoice in another language for the customer.
Is my data safe?
Your Zoho remains yours. HeyLynx only runs commands using your AES-256-GCM-encrypted token, isolated per client. Revoke OAuth anytime.
What if the bot gets an invoice wrong?
Every invoice is a draft first. You review the PDF in WhatsApp before sending. Nothing reaches the customer without your explicit OK.
Can I cancel?
Yes. Monthly, no lock-in. Cancel and the bot is turned off; your data stays available in your Zoho org — you don't lose anything.
Is there human support?
Yes. Lynx Ledgers replies in Portuguese, Spanish, and English via WhatsApp under 4 hours (Lynx+). The bot complements the team — it doesn't replace it.
Which states do you cover?
We cover New England — Massachusetts, Rhode Island, Connecticut, New Hampshire, Maine, and Vermont. Other states by request.
How long does activation take?
After signing up for Lynx+, activation in up to 24 business hours. You get the bot's WhatsApp number and the Zoho authorization link. ~10 minutes later, you're billing.
Ready to start
Start Lynx+ today. Bot live in 24 hours.
Full monthly bookkeeping + HeyLynx on WhatsApp. No setup fee. No contract. $597/month.