How to Connect 15Five with GMass (2026)

15Five

★★★★ 4.4

Hr Recruiting Performance

A performance management platform with continuous feedback, OKRs, engagement surveys, and manager effectiveness tools.

Full Review

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GMass

★★★★ 4.5

Cold Outreach Sales Outreach

GMass is a mass email and cold outreach tool that works directly inside Gmail. It turns Gmail into a powerful…

Full Review

About These Tools

15Five: A performance management platform with continuous feedback, OKRs, engagement surveys, and manager effectiveness tools.

GMass: GMass is a mass email and cold outreach tool that works directly inside Gmail. It turns Gmail into a powerful email marketing and outreach platform with mail merge, automatic follow-ups, and campaign analytics.

Key Features

15Five

Weekly check-ins
OKRs
Engagement surveys
Performance reviews
1-on-1s
High fives recognition

GMass

Gmail-based sending
mail merge
automatic follow-ups
email tracking
campaign reports
scheduling

Pricing

15Five

Subscription $4-$14/user/month

GMass

Freemium $0-55/mo

Detailed integration guide coming soon. We're researching the specific ways 15Five and GMass work together — including native integrations, third-party connectors, and API options. Check back for a complete step-by-step guide.

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