Limited seatsLive sessionMaster Claude ProCohort July 2026€1490
3 seats of 15
See the program
Agency · SellsyFree audit

SELLSY AGENCY FOR A FRENCH CRM + INVOICING THAT JUST WORKS

Hack'celeration is a Sellsy agency for French and European SMBs. The team configures Sellsy CRM, quotes, invoices, accounting and treasury in one connected stack. Result: 4 weeks to go-live, electronic invoicing ready, and a genuine French alternative to Zoho or HubSpot when local compliance and language matter.

Free 60min audit →See how we work →
S
Sellsy Agency — workflow & automation.
Hack'celeration Agency

Want a French CRM + invoicing stack live in 4 weeks?

Free · No commitment · Quick reply
Our agency · why us

Why pick a Sellsy agency that knows French SMBs

Sellsy is one of the few SaaS suites built specifically for French SMBs: CRM, quoting, invoicing, accounting and treasury in one tool, French support, French GDPR-compliant hosting (OVH), and ready for the 2026/2027 electronic invoicing reform (facturation électronique). Hack'celeration works with Sellsy because it solves a real problem: French SMBs juggling 4 tools (HubSpot for CRM, Quickbooks or Pennylane for accounting, Stripe for payments, Excel for forecasts) and losing 8 hours a week in reconciliations.

What changes in week 1: one record per client across CRM, quotes, invoices and accounting. Automatic payment reminders, native Stripe and GoCardless integration, accountant access without a license. A field note: a 22-person agency was using HubSpot + Quickbooks + Stripe + Excel. The team consolidated to Sellsy in 5 weeks. Monthly close went from 4 days to 1.5 days. Cash forecasts went from "vibes" to real numbers, refreshed daily.

You also get integration reflexes. The team plugs Sellsy into n8n for custom automations, into HubSpot when marketing keeps HubSpot, and into your e-commerce (Shopify, WooCommerce, Prestashop). Quick win: turn on Sellsy's automatic payment reminders. Most French SMBs collect 15 to 25 days faster within 60 days.

Sellsy · agency services

What a Sellsy agency delivers concretely

The team owns the full Sellsy journey: scoping, CRM setup, invoicing config, accounting connection, treasury setup, integrations and training.

CRM configuration. Pipelines per sales motion, custom fields for your sector (services, e-commerce, distribution), lead source tracking, opportunity scoring, automated tasks and reminders. The team builds Sellsy's dashboards for managers and reps, not just CEOs. Mobile app configured for in-meeting updates.

Read more+3

Quoting and invoicing. Quote templates with your brand, product/service catalog, pricelists by segment, e-signature, automatic conversion from quote to invoice, partial billing, recurring invoices, dunning rules in 3 levels. Multi-currency and multi-VAT when needed. Integration with Stripe, GoCardless, bank transfer, and SEPA direct debit. Setup for the upcoming French electronic invoicing mandate (facturation électronique B2B).

Accounting and treasury. Bank sync via Bridge, automatic reconciliation, VAT reports, accountant export (FEC, Sage, EBP, Cegid). Cash forecast based on confirmed sales + open invoices. According to Sellsy's customer data, French SMBs save 6 to 10 hours per month on accounting after a clean Sellsy + accountant setup.

Integrations. Bridge for banks, Stripe and GoCardless for payments, Shopify/WooCommerce/Prestashop for e-commerce, Aircall for telephony, Brevo for emailing, n8n for custom flows, accountant tools (Cegid, Sage, EBP, Pennylane), HR (PayFit). Quick win: automate quote-to-invoice conversion. Most SMBs save 4 to 8 hours per week on admin.

4
WEEKS LIVE
for CRM + Invoicing + Accounting scope
-60%
LATE PAYMENTS
average drop after dunning rules + Stripe setup
+8H/WEEK SAVED
+8H/WEEK SAVED
by automating quote-to-invoice and reminders
Sellsy · playbook

Sellsy rollout in 4 weeks flat

Sellsy is fast to deploy when scoping is tight. Week 1: workshop with sales and finance, import of contacts, products and open invoices, pipeline design. Week 2: quote templates, invoice templates, dunning rules, Stripe and Bridge connection. Week 3: accounting export config, integrations (e-commerce, accountant), training. Week 4: go-live, daily standups to fix friction, first monthly close in parallel with old tool.

By week 4 you have Sellsy live with sales reps quoting, finance issuing invoices, and the accountant getting clean exports. Quick win: don't import 5 years of historical invoices. Keep them in your old system as PDF archive. Start fresh with current period only. Migration time drops 60% and reporting stays clean.

Sellsy · cross-team

A Sellsy agency for sales, finance and ops

Sales. Sellsy's pipeline view, quote templates with one-click e-signature, automatic follow-up on quotes sent, mobile app for in-meeting updates, native Aircall integration for calls. The team configures the rep view to be 4 fields max: log activity, send quote, move stage, convert to invoice. Adoption follows simplicity.

Finance. Automatic invoice generation from quotes, bank reconciliation via Bridge, payment tracking, 3-level dunning rules (D-7, D, D+15), accountant export in FEC format. Cash forecast based on real data, not Excel guesses. The team also handles VAT setup (multi-rate, multi-country, EU intra-community). According to Sellsy's data, finance teams cut closing time by 40 to 50% after clean Sellsy setup with bank sync.

Operations. Stock management for product businesses, project tracking for services, time tracking and rebilling. Recurring invoices for SaaS and subscription models. Treasury dashboards for the CFO. Integration with HR tools (PayFit, Lucca) and accountant platforms. Quick win: enable Sellsy's accountant access for free; your accountant works inside Sellsy, no more email back-and-forth on missing pieces.

+45%
QUOTE→INVOICE
conversion lift with e-signature and follow-ups
-50%
MONTHLY CLOSE
with bank sync and clean accountant exports
3X
FASTER CASH FORECAST
vs Excel-based forecasting
Our agency · innovations

A Sellsy agency that plays with AI and electronic invoicing

Sellsy added AI features in 2025: smart categorization on bank transactions, AI-drafted dunning emails, contact deduplication. The team configures these properly so they help, not annoy. On top of that, the team builds custom AI workflows on n8n: lead enrichment via Apollo and Pappers, automatic supplier invoice extraction (OCR + Claude) pushed to Sellsy accounting, AI-drafted follow-up emails using Claude with deal context.

The team also handles the French electronic invoicing reform (facturation électronique B2B), live from September 2026 for large companies and rolling out to SMBs through 2027. Sellsy is registered as a PDP (Plateforme de Dématérialisation Partenaire) candidate, which means clients using Sellsy will be compliant by default. The team configures everything: e-invoice formats (Factur-X, UBL, CII), PPF (Plateforme Publique de Facturation) connection, lifecycle statuses. Better start now than panic in Q3 2026.

Frequently asked questions

01Sellsy or Zoho, which one for a French SMB?+
Sellsy wins on French market fit: native French language, French support, OVH hosting, French accounting integrations (FEC, Cegid, Sage, Pennylane), and PDP-ready for the electronic invoicing reform. Zoho wins on cost at scale, broader CRM features and global reach. For a French SMB under 100 employees with French accounting, Sellsy is usually the right call. Above 100 with international scope, Zoho often wins.
02Sellsy or HubSpot for a French company?+
HubSpot wins on marketing depth, content tools and ecosystem. Sellsy wins because it includes invoicing, accounting and treasury in the same tool. For French SMBs that need CRM + invoicing in one place, Sellsy is 2 to 3x cheaper than HubSpot + a separate billing tool. The team has shipped both and recommends based on your marketing vs finance priorities.
03How long does a Sellsy implementation take?+
4 weeks for CRM + Invoicing + Accounting scope on a team of 10 to 30. Add 1 to 2 weeks per heavy integration (e-commerce, custom ERP, multi-entity). Pure import + activation can be done in 1 week but won't deliver the value. The team works in 1-week sprints with clear milestones. The audit gives you a precise estimate based on your scope.
04Is Sellsy ready for the French electronic invoicing reform?+
Yes. Sellsy is a registered candidate as PDP (Plateforme de Dématérialisation Partenaire), with mandatory e-invoicing rolling out for large companies in September 2026 and full SMB rollout through 2027. Sellsy will handle Factur-X, UBL and CII formats natively, plus PPF connection. The team sets up your company for compliance now, ahead of the deadline.
05Can my accountant access Sellsy without an extra license?+
Yes. Sellsy includes free accountant access. The team configures the right permissions (read-only on most modules, write on accounting export) and trains your accountant on FEC export. Compatible with Cegid, Sage, EBP, Pennylane, and most French accounting platforms. Saves 4 to 6 hours per month on accountant back-and-forth.
06Do you handle migration from Pennylane, Quickbooks, or HubSpot?+
Yes. The team imports contacts, products, open invoices, open quotes and current period data. Historical data (closed invoices, paid items) is archived or imported with reduced detail. Common migrations: Pennylane (full data export), Quickbooks (via CSV + custom mapping), HubSpot (native + custom API for invoicing data). A staging period of 2 weeks runs in parallel before cutover.
07Is Sellsy GDPR-compliant and hosted in France?+
Yes. Sellsy is a French company hosted on OVH (Roubaix, Strasbourg), fully GDPR-compliant. DPA available, data residency in France guaranteed. The team configures consent fields, retention policies, user permissions, and audit logs. For sectors with extra requirements (health, legal), the team adds field-level encryption via integrations. Ideal for French SMBs sensitive to where their data sits.
08What integrations do you set up with Sellsy?+
Most used: Stripe and GoCardless for payments, Bridge for banks, Shopify/WooCommerce/Prestashop for e-commerce, Aircall and Ringover for telephony, Brevo for emailing, PayFit and Lucca for HR, Pennylane for accountant view, HubSpot for marketing sync, n8n for custom workflows. The team reviews marketplace apps honestly before installing them.
09How do you avoid the classic Sellsy under-use?+
Sellsy fails when teams use only the CRM or only the invoicing. The team scopes the full flow (lead to cash) from week 1 and trains sales + finance together. Weekly check-ins for the first 6 weeks catch friction early. The team also coaches managers on the right metrics: pipeline weighted by stage, DSO, cash forecast. Adoption is process plus design.
10What does the first 60min audit cover?+
Review of your current stack (CRM, invoicing, accounting), team size, sales motion, French compliance needs (TVA, e-invoicing, accountant), integrations, and timeline. You leave with 5 to 8 concrete recommendations, a 4-week rollout plan, and a transparent budget estimate. No upsell pressure. Book a slot and bring sales, finance, and ideally your accountant.
Hack'celeration Agency

Ready to put CRM, quotes and invoicing in one French tool?

Free · No commitment · Quick reply
More to explore

We can also help you with more.

Browse all agencies