A CoStar alternative for prospecting (not for comps)
Let us start with what this page is not: SourceDeck does not replace CoStar for comps, sale history, or market analytics. CoStar has spent decades building that dataset and it is the industry standard for a reason. Many SourceDeck founding members keep their CoStar subscription.
What CoStar was never built to do is work the top of your funnel. It can tell you what a building traded for; it will not resolve the LLC that owns the one next door to a cell phone, verify the email, draft the outreach, and stage it for your approval. That is the job SourceDeck does.
Scope, honestly
| Dimension | CoStar | SourceDeck |
|---|---|---|
| Core job | Market data: comps, sale and lease history, analytics, and listing exposure through LoopNet | Prospecting: owner sourcing, contact resolution, zoning opportunity scoring, and human-approved campaigns |
| The question it answers | What has traded, at what price, and what is on the market | Who owns it, how to reach them, and which parcels are worth the call |
| Ownership data | Property records with owner names, often the entity of record | LLC resolution through the state registry to a named human, then contact enrichment and MillionVerifier verification |
| Zoning intelligence | Property-level records and analytics | Live county GIS zoning layers, opportunity scores out of 100 with factor breakdowns, development news with linked articles, land-residual analyzer |
| Outreach | None; CoStar is a research and listing platform | Buyer blasts, seller teasers, and cold email, verified-only recipients, human approval before every send |
| Pricing model | Seat-based contracts quoted by market and modules; brokers commonly report hundreds of dollars per seat per month and up | $750 per month founding rate (list $999), with white-glove market onboarding included for founding members |
CoStar packaging is quoted per contract and varies widely; confirm with CoStar. This table compares scope, not quality: the products mostly do different jobs.
Who should still buy CoStar
Almost everyone doing serious CRE brokerage needs comps and sale history, and CoStar is the deepest source. If you value listings exposure, LoopNet reach matters too. SourceDeck does not provide either.
If your practice is valuation-heavy (appraisal support, broker opinions of value at volume), CoStar’s analytics are the tool for that job.
The honest verdict
This is less either-or than the page title suggests. CoStar is where you research the market; SourceDeck is where you work it. If your prospecting today is a CoStar export pasted into a spreadsheet and a mail merge, SourceDeck replaces the spreadsheet, the skip-trace vendor, the verifier, and the mail merge, and adds a queue where you approve every send.
Questions brokers ask
Does SourceDeck include comps?
No. SourceDeck is a prospecting and outreach platform. For comps and sale history, brokers keep a research product such as CoStar; the two run side by side without overlap.
Does SourceDeck list my properties anywhere?
No. SourceDeck markets your listings through campaigns to verified contacts and hosted OM share links, not through a public listings marketplace like LoopNet.
Can SourceDeck use data I export from other tools?
SourceDeck works from county records, state registries, and its own enrichment pipeline, and your existing records are imported during white-glove onboarding. Respect the license terms of any third-party data you bring.
Competitor pricing and packaging change frequently and vary by contract; always confirm current terms with the vendor. Product observations reflect publicly available information at the time of writing. All trademarks belong to their respective owners; SourceDeck is not affiliated with or endorsed by any company named on this page.
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