Inversionistas Ángeles
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Deal Mechanics

Red flags in a startup pitch

Most bad angel investments do not look bad in the pitch — that is the point of a pitch. Here are the warning signs that hold up across hundreds of deals, and what each one usually means underneath.

In the numbers

Vague or shifting metrics

A founder who cannot give a straight answer on revenue, users or retention — or whose numbers change between conversations — is either not tracking the business closely or hoping you will not check.

Vanity metrics without unit economics

Downloads, sign-ups and "GMV" sound impressive but say nothing about whether the business makes money on each transaction. Ask what happens to a single unit of revenue after costs.

No credible path to the number raised

If the amount being raised does not map to a specific set of milestones (hire X, reach Y revenue, launch Z market) with a runway calculation behind it, the round size may be arbitrary.

In the team and the room

Founder conflict, visible or implied

Co-founder tension is the single most common reason companies fail after raising. Watch how founders talk about each other, who answers which questions, and whether equity splits are already a sore subject.

Pressure tactics

"This round closes in 48 hours" or "three other investors are in" can be true — but used as pressure to skip diligence, it is a reason to slow down, not speed up.

Unwillingness to share references or data room

A founder who deflects requests for customer references, the cap table, or basic financials is telling you something, whether or not that is the intention.

In the market story

Be skeptical of total-addressable-market numbers that work backward from a huge headline figure ("if we just capture 1% of a $500B market...") rather than forward from a specific, winnable customer segment. The best market sizing starts small and credible, not big and aspirational.

"No competitors" is nearly always false — it usually means either the founder has not looked closely, or the real answer is that the alternative is doing nothing (which is itself a hard competitor to beat).

Frequently asked questions

Is one red flag enough to pass on a deal?
Rarely on its own — most good deals have at least one imperfection. What matters is the pattern: multiple unrelated red flags, or a founder’s reaction when you raise a concern directly (defensive versus thoughtful), tell you more than any single flag alone.
How do I raise a concern without offending the founder?
Frame it as a specific, answerable question rather than an accusation — "walk me through how retention is trending" rather than "your retention seems bad." A strong founder will engage directly; a weak one will get defensive or evasive.
What if a red flag shows up after I have already committed verbally?
A verbal commitment is not a wire transfer. It is normal, and expected, to walk away — professionally and with a clear reason — if diligence surfaces something material before money actually moves.
Are red flags different for LATAM startups specifically?
The fundamentals are the same everywhere, but a few things get extra scrutiny in the region: cross-border legal structure (where is the holding company actually incorporated?), FX and currency risk on runway calculations, and how the company plans to handle multi-country expansion versus staying focused on one market.