cold0
ConditionalFree open-source cold email sender built with SvelteKit. Contact lists, personalized templates with dynamic variables, and PostgreSQL-backed management.
Tool matchup
cold0 vs Gumroad for consultants. cold0 fits Lead Gen & Outbound workflows; Gumroad fits Ops & Finance workflows. See when to choose each.
Free open-source cold email sender built with SvelteKit. Contact lists, personalized templates with dynamic variables, and PostgreSQL-backed management.
The simplest way to sell templates, frameworks, courses, and digital downloads. Zero monthly fee — Gumroad takes 10% per transaction. Used by consultants productizing their expertise into sellable assets. No complex setup, no storefront to maintain. List a product, share a link, get paid.
Gumroad leads by 40 points (clear winner).
Client-ready brief
Send a concise summary of winner, trade-offs, and rollout recommendation.
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| C cold0 | Gumroad | |
|---|---|---|
| Quick facts | ||
| Pricing sanity | Free | Contact sales |
| Setup speed | Long setup | 5 min setup |
| Intelligence | Focused | High |
| Integrations | 2+ | 3+ |
| Score breakdown | ||
| Outcome fit | 10/25 | 21/25 |
| Setup speed | 6/20 | 19/20 |
| Pricing sanity | 14/15 | 12/15 |
| Integrations | 6/15 | 10/15 |
| UX polish | 5/15 | 14/15 |
| Trust & support | 3/10 | 8/10 |
| Summary | ||
| Best for | Developers who want to learn cold email infrastructure from the ground up. | Consultants productizing their expertise into sellable templates, frameworks, and digital downloads. |
| Key strength | Strong on pricing | Strong on setup speed |
| Main weakness | Strong on setup speed | Strong on integrations |
Guides
Your tool needs change at every growth stage. A practical guide to the technology, processes, and decisions that take you from solo consultant to small firm — without losing what made you great.
Building Your Consulting Knowledge VaultConsultants waste 8.2 hours per week recreating work they have done before. Build a knowledge system that compounds — the independent consultant's answer to McKinsey's Lilli.
The Consultant's Pricing Playbook: From Hourly to Value-BasedStop leaving money on the table. A practical guide to evolving your pricing from hourly billing to value-based engagements — with tools, templates, and benchmark data at every stage.
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