Mailshake vs YAMM (2026)
Choose between giving sales representatives a shared engagement workflow and sending a prepared Gmail draft to a spreadsheet list. Mailshake extends email campaigns with calling, social tasks and Lead Catcher. YAMM uses Google Sheets and Gmail for mail merge, tracking and selected follow up campaigns. Their treatment of replies is a useful separator: Mailshake turns engaged responses into sales work, while YAMM's follow ups require the sender to select an audience and launch another campaign. YAMM also ties working unsubscribe links to tracking being enabled, so disabling tracking changes more than reporting. Neither defines a full portable package for campaign history and reply handling. Teams managing prospects across channels and a CRM will want Mailshake's workspace. A person or small team already working from Google Sheets, needing a controlled merge rather than a continuing multichannel sequence, can stop at YAMM.
- Calls and social tasks belong beside email.
- Engaged replies need a shared sales queue.
- CRM activity synchronization is useful.
- The list and draft already live in Google.
- A mail merge and selected follow up cover the need.
- A yearly Gmail or Workspace subscription fits.
This comparison is published by GTM Tech Index, an independent research platform that compares go to market software vendors objectively. Mailshake and YAMM are each graded against the same capability taxonomy, from each vendor's own public materials, under the GTM Tech Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| Mailshake | YAMM | |
|---|---|---|
| Primary category | Sales Engagement & Outreach | Sales Engagement & Outreach |
| Founded | 2017 | Not published |
| Headquarters | Not published | Not published |
| Website | mailshake.com | yamm.com |
Side by Side
| Axis | M Mailshake |
Y YAMM |
|---|---|---|
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AI Capability
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| AI Centrality | ||
| Autonomy and Oversight Model | ||
| AI Disclosure and Model Transparency | ||
| Operational and Outcome Evidence | ||
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Compliance and Risk
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| Outreach Compliance Posture | ||
| Data Privacy Posture | ||
| Data Licensing and Provenance | ||
| Platform Terms Exposure | ||
| AI Safety and Data Stewardship | ||
| Recipient Disclosure and Authenticity | ||
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Integration and Deployment
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| Ecosystem and Integration Depth | ||
| Deployment Model and Data Residency | ||
| Security Certifications and Trust Center | ||
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Commercial and Operational
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| Commercial Transparency | ||
| Exit and Data Portability | ||
| Deliverability and Sending Discipline | ||
| Segment and Market Coverage | ||
The short version of each
Mailshake
Mailshake turns engaged replies into sales work, where YAMM leaves each next step to the sender's own judgment. Campaigns run through connected mailboxes as continuing sequences, and the top tier adds calls and social touches. Lead Catcher collects prospects who reply or engage so a representative can respond while the context is fresh. Two way CRM synchronization records the activity, and the writing assistant helps draft copy. In the GTM Tech Index, Mailshake is the representative's workspace in this pair rather than a merge tool. List cleaning, scheduling and domain setup tools prepare campaigns, and Data Finder can supply contacts as a separate purchase.
Source: GTM Tech Index, 2026
YAMM
YAMM sends a prepared Gmail draft to the rows of a Google Sheet and writes the results back to that sheet, a controlled merge rather than Mailshake's continuing multichannel sequence. Each follow up is its own launch, aimed at a response group the sender selects and able to continue the original thread when subject and sender match. Quotas count every recipient, CC and BCC included, and depend on the Google account type. Google Forms submissions can trigger a message on their own. Beside Mailshake on the GTM Tech Index, YAMM is the tool for one person or a small team. Contact data and drafts stay in the customer's Google account.
Source: GTM Tech Index, 2026
Common questions
Are YAMM follow ups a fully autonomous sequence?
The sender selects recipients and launches a follow up campaign. Using the same subject and sender supports an existing thread, but the follow up still requires that launch. Graded by GTM Tech Index against seventeen capability axes from each vendor's own published materials, verified October 12, 2026. No vendor pays for placement.
Why does tracking matter to YAMM unsubscribes?
YAMM's unsubscribe links work when tracking is enabled. Turning tracking off affects that mechanism as well as engagement reporting. Graded by GTM Tech Index against seventeen capability axes from each vendor's own published materials, verified October 12, 2026. No vendor pays for placement.
How much does YAMM cost compared with a Mailshake seat?
YAMM is $72 a year for a personal Gmail account or $144 for Google Workspace, billed annually. Mailshake sells engagement seats, with calling and social steps tied to the package, and Data Finder contact credits are a separate subscription. Graded by GTM Tech Index against seventeen capability axes from each vendor's own published materials, verified October 12, 2026. No vendor pays for placement.
What happens to our data after leaving Mailshake or YAMM?
Mailshake's synchronized activity stays in the CRM, though it sets out no combined export of sequences, prospects and replies. YAMM's sheet and drafts never left the customer's Google account; the metadata YAMM holds needs a support request to delete, even once the add on is removed. Graded by GTM Tech Index against seventeen capability axes from each vendor's own published materials, verified October 12, 2026. No vendor pays for placement.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Sales Engagement & Outreach page.
YAMM's tracking choice affects its unsubscribe mechanism. Mailshake's additional channels and both products' account connections remain subject to communications and mailbox rules.