Lightmeter

Active

Managed Sales Email Delivery For Cold Outreach

Winter 2022Founded 20225 peopleLondon, England, United Kingdom

lightmeter.io ↗LinkedIn ↗X ↗Crunchbase ↗See on the Idea Map B2B momentum

About

Lightmeter is turn-key email outreach infrastructure for startups, combining network, platform, and expert advice. It integrates with sales tools like Apollo, replacing Google and Microsoft for email delivery. No change in tooling or workflow required. Lightmeter gets mail into inboxes, scalably and sustainably, while transparently reporting on performance. Plans from 50 to 7,500 outreach emails per day.

From their website

as of Jun 7, 2026lightmeter.io ↗

SaaSSubscription

Lightmeter provides a managed, AI-powered outbound email delivery network designed for sales outreach. It positions itself as an independent delivery layer that protects deliverability and inbox placement for cold outreach campaigns.

Lightmeter operates a dedicated delivery network that checks, cleans, and routes outbound sales emails through Lightmeter servers (independent of Google/Microsoft). It offers domain warmup powered by GenAI, automated inbox placement testing, address validation, analytics, and disruption prevention with backup domains/mailboxes. The platform provides an analytics UI with performance insights and automated testing to ensure emails land in the inbox, plus expert support and scalable outreach capabilities including an API-like delivery flow via its own infrastructure.

Features

Warmup with GenAI-powered domain reputation management
Outreach delivery through Lightmeter servers independent of major providers
Disruption prevention with backup domains and mailboxes
Automated daily inbox placement testing
Address validation to improve deliverability
Analytics platform for delivery performance and data export
Expert-supported, managed delivery experience

mentions of YC-backed origin, testimonials from growth-stage companies, and acquisition/news activity (e.g., made with love by open source advocates; referenced acquisitions) indicating traction and market interest

Founders · 1

Sam TukeFounder

Sales mail delivery at scale. CEO at Lightmeter. Sam founded his first Open Source software business age 17, shipping Linux computers he assembled himself. From 2015-2019 he was CEO of phpList, the Open Source Mailchimp alternative, building a base of 10k SaaS customers, and sending 28 bn emails yearly. In 2019 he created mailserver automation app Lightmeter, and two years later used it to launch the first dedicated sales email delivery service of the same name.

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