CRM and sales decision
PROSP
A technical user can build a narrow self-hosted replacement that handles personalized messaging and voice-note TTS via a browser extension and hosted backend, but reproducing Prosp’s bundled proxies, cloud-side sending/account rotation, and managed support is non-trivial and would not be included in the minimal replacement.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All PROSP alternatives, with the arithmetic →
What a replacement has to do
- Import or collect prospects, generate per-prospect personalized message and TTS voice note, schedule/send messages via the user's LinkedIn browser session, and surface replies in a unified inbox.
What it still won’t have
- Built-in residential proxies and account rotation to avoid LinkedIn bans
- Cloud-based sending that operates without the user's machine
- Dedicated vendor support, managed sharing of per-account proxies, and enterprise onboarding
- Any proprietary AI voice-cloning model or bundled voice infrastructure
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 2 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal self-hosted LinkedIn outreach app+Chrome extension using Node.js (Express) backend, React frontend, Postgres DB, and a worker queue (BullMQ). Scope in: lead import CSV, simple lead profile extractor (from CSV + extension-provided profile snippets), campaign builder that sequences messages, integration with OpenAI (or similar) for per-lead message personalization, TTS generation for voice notes, a Chrome extension that uses the user's LinkedIn session to send messages and report reply events back via a secure webhook, send pacing/scheduling worker to avoid rate spikes, and a unified inbox listing replies and message statuses. Scope out: residential proxy pool, server-side LinkedIn scraping, enterprise billing, multi-tenant account rotation, and any paid voice-cloning/model training. Include retries, rate-limit handling, authentication (OIDC or JWT), logging, end-to-end tests for scheduling and extension<->backend sync, and error handling for API failures.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 3 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 3
Every page the run actually retrieved.
- official productProsp | LinkedIn outreach so personal, prospects actually reply
- official pricingProsp Pricing
- open sourcefilip-michalsky/SalesGPT
Integrity checks
What held up, and what did not.
