Mailshake
- Starting price: $29/user/month
- Free plan: 30-day money-back guarantee
- Founded: 2017
- HQ: Austin, TX, USA
Mailshake lives or dies by sender reputation - warmup pools, IP rotation, inbox health. The side-by-side comparison below weighs Mailshake's deliverability stack and per-seat scaling against Derrick's upstream model: clean Sheets-side enrichment first, send wherever your stack already sends from.
✓ Free forever · ✓ No credit card · ✓ Cancel anytime · ✓ Your data stays in your Sheet
Trusted by 27 000+ users worldwide.





CURSOR 3 core reasons SDRs and ops teams switch to Derrick. Click to expand each.
The friction with Mailshake and Smartlead isn't the data quality — it's the workflow shape. Export from the platform, import into Sheets, hope the columns line up. Derrick collapses all of that into a single formula call. The enrichment happens where the data already lives, with the team that already owns the sheet.
Mailshake ($29/user/month) and Smartlead ($39/month) follow the SaaS-standard model : tier the features, cap the credits, upsell when you outgrow it. Derrick is the opposite — one tier, $10/month, no caps, no seats. Predictable spend for teams that hate budgeting around credit-pool refills.
Derrick exposes its enrichment API via MCP (Model Context Protocol) — Claude, ChatGPT, Cursor, and other LLM agents can call Derrick directly from your sheet without writing integration code. Mailshake and Smartlead require Zapier, Make, or custom API wiring to do the same.
We're upfront - every tool has strengths. Here's where Mailshake, Smartlead, and Derrick each genuinely win.
Headline pricing rarely tells the whole story. Here's the real cost of running each tool for a year.
| Mailshake | Smartlead | Derrick | |
|---|---|---|---|
| Starting price (monthly) | $29/user/month | $39/month | €0 (free) · €9/mo paid |
| Annual cost (base) | ~€348/yr | ~€468/yr | €0/yr free · ~€108/yr paid |
| Free plan? | 30-day money-back guarantee | 14-day free trial | ✓ Forever - 100 credits/mo |
| Setup cost | Hours to days | Hours to days | 30 seconds via Marketplace |
| Switching cost | CSV export + retraining | CSV export + retraining | Zero - works alongside any stack |
💡 Most teams pay 2-5x more on add-ons (extra seats, phone credits, integrations) than on the headline base price. Derrick keeps everything in one transparent tier.
| Mailshake | Derrick App | Smartlead | |
|---|---|---|---|
| Entry price | $29/user/month | $10/mo flat | $39/month |
| Free plan | 30-day money-back guarantee | 14-day full trial | 14-day free trial |
| Best for | Traditional SDR teams on Salesforce | Sheet-native enrichment | AI-first cold email teams |
| Category positioning | Sales engagement | Spreadsheet-native B2B data | Cold email outreach |
| G2 rating | 4.4/5 | — | 4.7/5 |
| Founded | 2017 | 2022 | 2022 |
| Mailbox model | Per-user (1-5 mailboxes/seat) | N/A — data not sender | Unlimited on all paid tiers |
| Built-in warm-up | Basic, no private network | N/A | Automated, no private network |
| AI personalization | Added 2024, less mature | Via LLM integrations | Bundled on Basic |
| Bundled B2B database | Standalone | Derrick search + enrich | 200M contacts (Pro+) |
| Works natively in Google Sheets | ✕ | ✓ | ✕ |
| Per-row pricing (no credit caps) | ✕ | ✓ | ✕ |
| MCP-ready for AI / LLM agents | ✕ | ✓ | ✕ |
Sales engagement $29/user/month
Best for: Traditional SDR teams on Salesforce
For traditional sdr teams on salesforce, Mailshake sales engagement starts at $29/user/month. Tier ceilings, credit refresh rules, and per-seat economics are all detailed on the Mailshake pricing page below.
Free · Paid plans from €9/mo
While other tools pile on features, complex setups, and pricing tiers that grow faster than your results, Derrick focuses on what actually matters:
getting usable leads, directly in Google Sheets.
No heavy workflows, No endless configuration. No learning curve.
Cold email outreach $39/month
Best for: AI-first cold email teams
Smartlead starts at $39/month. Cold email outreach, with positioning around ai-first cold email teams. Full tier-by-tier breakdown including credit caps, seat economics, and hidden line items lives on the dedicated Smartlead pricing page.
Derrick is a Google Workspace app - no formulas to learn, no pipelines to migrate, no engineering work. Add it to Google Sheets and you're enriching in under a minute.
Click the install button on our Marketplace listing and grant Google Sheets access. No credit card required - you start with 100 free credits per month.
Open a Sheet with your prospect list (paste a CSV from Mailshake, scrape from LinkedIn Sales Navigator, or import from your CRM). Click Extensions → Derrick and the sidebar opens with all enrichment features ready to use.
Select the column with names, LinkedIn URLs, or company domains. Pick what you want - emails, phone numbers, LinkedIn data, company info, tech stack - and click "Enrich". Derrick fills the columns directly in your Sheet. No exports, no pipelines, no waiting.
100 free credits / month · No credit card · Cancel anytime
See what our customers say about Derrick.
"This app saved me so much time and effort. Great for anyone looking to build a contact list or network at scale quickly. As a start-up it's been invaluable."
"Working pretty nifty compared to Snov.Io. Price wise it does give a fair shake, and IMO better interface since it's google sheets."
"Derrick is a very simple and user-friendly app to enrich your contacts database. Best thing: you can test it for free. And then the price is so low, it's a no brainer."
"Super easy to enrich linkedin urls using this tool. Both personal and company url data can be easily enriched with a click of a button."
"Amazing Tool, I would like to advocate this to my colleagues. So that you can get more users. Keep it Up. 5 Stars!"
"This app is fantastic. Brilliantly created to help small and mid sized businesses."
"I have been using other expensive apps or freemium like phantombuster, but Derrick has replaced them all. I love the simplicity of the Google sheet add-in, but what is best is the efficiency it delivers."
"The LinkedIn scraping and email finder combo is incredibly powerful. I can build a complete prospect list with contact info in under an hour. Absolute must-have for outbound."
"Have tested over 10+ LI scraper apps, Derrick beats them all. Simple to use, accurate data, and affordable price."