Mailshake vs Sellsy: Complete Comparison (2026)
An in-depth comparison of Mailshake and Sellsy to help you choose the right tool for your business.
Last updated: November 2026
Mailshake
6.5/10
Mailshake is a cold email and sales engagement platform with sequences, warmup, a unified inbox, a phone dialer and CRM sync, aimed at small outbound sales teams.
Sellsy
5.8/10
French all-in-one CRM and lead-to-cash suite that combines sales pipelines, quotes with e-signature, invoicing, e-invoicing, marketing, and cash management for SMEs.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.5/10 | 5.8/10 |
| Customization | 5/10 | 6/10 |
| Analytics | 6/10 | 6/10 |
| Integration | 7/10 | 6/10 |
| Support | 8/10 | 7/10 |
| Ease of Use | 8/10 | 5/10 |
| Security | 5/10 | 7/10 |
| Cost | 7/10 | 5/10 |
| Scalability | 5/10 | 5/10 |
| Pricing | ||
| Free plan | No | No |
| Cheapest paid plan | $29/user/mo Starter | €35/user/mo Sales Standard |
| Estimated cost for 10 users | $290/mo Starter | €350/mo Sales Standard |
| Features | ||
| Collaboration | ||
| Contact Management | ||
| Integrations | ||
| Lead Management | ||
| Reporting & Analytics | ||
| Sales Automation | ||
| Built-in Calling | Not listed | |
| Marketing Automation | Not listed | |
| Mobile Access | Not listed | |
| Opportunity Management | Not listed | |
Mailshake vs Sellsy cost by team size
| Team size | Mailshake | Sellsy |
|---|---|---|
| 1 user | $29/moStarter | €35/moSales Standard |
| 5 users | $145/moStarter | €175/moSales Standard |
| 10 users | $290/moStarter | €350/moSales Standard |
| 25 users | $725/moStarter | €875/moSales Standard |
| 50 users | $1,450/moStarter | €1,750/moSales Standard |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Mailshake
- Higher Ease of Use score (8/10 vs 5/10)
- Higher Cost score (7/10 vs 5/10)
- Better fit for startups (7/10 vs 4/10)
Why choose Sellsy
- Higher Security score (7/10 vs 5/10)
- Higher Customization score (6/10 vs 5/10)
- Better fit for mid-market (6/10 vs 4/10)
Pros & Cons
Mailshake
Pros
- Every plan includes unlimited email warmup, verification and contact uploads.
- One reviewer reported going from signup to a first campaign in under an hour.
- Support is rated highly: Capterra users give 4.5 for customer service, and a Prospeo summary cites a G2 average of 4.7.
- The Sales Engagement tier includes a dialer with unlimited free North American minutes.
- The integrations page lists many native CRM connections, including Salesforce, HubSpot, Pipedrive, Zoho, Copper and Freshsales.
Cons
- There is no free trial, and reviewers describe a strict refund policy.
- Invoices and cancellation confirmations are not emailed automatically.
- Reviewers say connected mailboxes can disconnect and stall sequences.
- LinkedIn steps are capped (Prospeo reports 10 messages per day), and Data Finder accuracy is described as weak.
- Per-user pricing becomes costly for teams larger than about five reps.
Sellsy
Pros
- Quotes convert to invoices without retyping, and quotes can be signed electronically in the same tool.
- Approved French e-invoicing platform included on every plan, ahead of France's e-invoicing reform.
- Data hosted in France, ISO 27001 certified, GDPR compliant, with daily backups.
- French-language chat support on every plan from an in-house team, plus phone support on higher tiers.
- More than 100 marketplace apps, including French accounting software and bank sync with Qonto.
Cons
- 12-month commitment even on monthly billing, and a 2-user minimum on the bundle.
- Reviewers say the interface is busy and takes about a week to learn.
- Cash management and advanced marketing tiers cost extra on top of per-user licences.
- Built around French accounting rules, so it fits non-French companies less well.
- Users report pricing changes, some invoicing glitches and duplicate contacts from Google sync.
Not sold on either?
Frequently Asked Questions
Mailshake scores higher on our CRM criteria: 6.5/10 against 5.8/10 for Sellsy. The largest gap is in Ease of Use: 8/10 for Mailshake and 5/10 for Sellsy.
No, neither Mailshake nor Sellsy lists a free plan.
Mailshake is the better fit for startups: we rate it 7/10 for them, against 4/10 for Sellsy.
