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 SendPortal for consultants. Compare two Lead Gen & Outbound tools on pricing, setup speed, strengths, and Curalo score.
Free open-source cold email sender built with SvelteKit. Contact lists, personalized templates with dynamic variables, and PostgreSQL-backed management.
Self-hosted open-source email campaign manager. Integrates with Amazon SES, Postmark, Mailgun, and SendGrid. Zero vendor lock-in, zero monthly cost.
SendPortal leads by 14 points (strong advantage).
Client-ready brief
Send a concise summary of winner, trade-offs, and rollout recommendation.
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| C cold0 | SendPortal | |
|---|---|---|
| Quick facts | ||
| Pricing sanity | Free | Free |
| Setup speed | Long setup | 2 hour setup |
| Intelligence | Focused | Focused |
| Integrations | 2+ | 3+ |
| Score breakdown | ||
| Outcome fit | 10/25 | 14/25 |
| Setup speed | 6/20 | 10/20 |
| Pricing sanity | 14/15 | 14/15 |
| Integrations | 6/15 | 8/15 |
| UX polish | 5/15 | 7/15 |
| Trust & support | 3/10 | 5/10 |
| Summary | ||
| Best for | Developers who want to learn cold email infrastructure from the ground up. | Developer-consultants who want self-hosted outreach with zero vendor lock-in. |
| Key strength | Strong on pricing | Strong on pricing |
| Main weakness | Strong on setup speed | Strong on UX quality |
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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