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How to get your k-factor up by 10x

https://www.vortexsoftware.com/
6•santiaparicio•8h ago

Comments

santiaparicio•8h ago
I’ve been fortunate to work with the same co-founders since college, 6 companies, $2.4B in exits. Every time, one growth lever decided whether we stalled or took off: engineered invitation flows.

When we nailed them, we scaled from 10 → 25,000 signups/day. When we didn’t, growth flatlined. And as a16z’s Andrew Chen has pointed out, the viral playbook that built Web 2.0 basically got lost in the mobile era.

So we built Vortex, the infrastructure that brings virality back (Auth0 for invites). Teams at GitLab, Rappi, New Relic and others are already installing it, seeing up to 10X lift in invite-to-activation.

We’re opening free beta spots. Want one? Grab one here: https://cal.com/santi-a/30min

Show HN: BestPick – Free AI selector for your best profile photo for social

https://bestpick.online/
1•ssdevproject•2m ago•0 comments

Fear of mass killings as thousands trapped in Sudan city taken by militia group

https://www.bbc.com/news/articles/clyld9w0283o
1•mhb•2m ago•0 comments

Jensen Huang says Nvidia's AI chips are now being manufactured in Arizona

https://www.cnbc.com/2025/10/28/nvidia-jensen-huang-gtc-washington-dc-ai.html
1•kamaraju•4m ago•0 comments

Gambling coin game – math and CS article

https://joshpearlson.com/articles/posts/coin-flip-game/modelCoinFlipGame.html
1•jcpearlson•6m ago•1 comments

Show HN: OutfitScore – Free AI-powered outfit, makeup and accessory analysis

https://outfitscore.com/
1•ssdevproject•7m ago•0 comments

Alertmouse - Simple, free alternative to Google Alerts

https://alertmouse.com/
1•cyrusshepard•9m ago•0 comments

Enough with the sales hype: there is nothing special about sales

https://greyenlightenment.com/2025/10/19/enough-with-the-sales-hype-there-is-nothing-special-abou...
1•paulpauper•9m ago•0 comments

Our Response to Reddit, Inc. vs. SerpApi, LLC: Defending the First Amendment

https://serpapi.com/blog/our-response-to-reddit-inc-v-serpapi-llc-defending-the-first-amendment/
2•hartator•9m ago•0 comments

Parens of the Dead

https://www.parens-of-the-dead.com/
1•rootforce•10m ago•0 comments

SwirlDB: Modular-first, CRDT-based embedded database

https://docs.swirldb.org/
1•owenm•11m ago•0 comments

Beating AlphaFold3

https://genesis.ml/news/introducing-pearl-the-next-generation-foundation-model-for-drug-discovery/
1•slashdave•12m ago•1 comments

John Carmack: "DGX Spark has only half the advertised performance"

https://twitter.com/ID_AA_Carmack/status/1982831774850748825
1•behnamoh•14m ago•1 comments

Touch, Our Most Complex Sense, Is a Landscape of Cellular Sensors

https://www.quantamagazine.org/touch-our-most-complex-sense-is-a-landscape-of-cellular-sensors-20...
2•mariuz•16m ago•0 comments

Keeping time across 120k light years

https://idiallo.com/blog/galactic-timekeeping
1•foxfired•17m ago•0 comments

AI Browser Comparison

https://nocodefounders.beehiiv.com/p/ai-browsers-explained-which-one-should-you-actually-use
1•Jthink•24m ago•0 comments

The U.S. Is on Track to Lose a War with China

https://www.theatlantic.com/ideas/archive/2025/10/us-lose-war-china-drone-warfare/684717/
5•breve•25m ago•0 comments

So You Want to Be Promoted

https://randsinrepose.com/archives/so-you-want-to-be-promoted-pt-1/
1•MattGrommes•25m ago•0 comments

The Pardon Was the Payoff

https://www.citationneeded.news/issue-95/
4•wslh•25m ago•0 comments

These robots can clean, exercise – and care for you in old age

https://www.bbc.com/news/articles/c9wdzyyglq5o
2•1659447091•26m ago•0 comments

Odyssey-2: instant, interactive AI video

https://experience.odyssey.ml/
1•lastdong•27m ago•0 comments

Your TV's HDMI Port Is Spying on You (Automatic Content Recognition)

https://blog.lon.tv/2025/10/28/your-tvs-hdmi-port-is-spying-on-you/
8•chao-•30m ago•1 comments

Police used Flock cameras to accuse a Denver woman of package theft

https://denverite.com/2025/10/27/bow-mar-flock-cameras-accusation/
1•mooreds•31m ago•0 comments

Lawyers allege cover-up after fed shoots at man during D.C. traffic stop

https://www.washingtonpost.com/dc-md-va/2025/10/27/dc-traffic-stop-shooting-dispute/
4•pavel_lishin•32m ago•0 comments

I'm a developer who thought a great product was enough. I was brutally wrong

https://xor01.substack.com/p/building-isnt-enough-a-developers
1•xor01•34m ago•1 comments

InvisiCaps: Pointers in Fil-C by Example

https://fil-c.org/invisicaps_by_example
1•fanf2•36m ago•0 comments

Bill Gates makes a claim about climate change

https://www.rnz.co.nz/news/world/577152/bill-gates-makes-a-stunning-claim-about-climate-change
2•colinprince•37m ago•1 comments

Display Resolution Calculator

https://www.cl.cam.ac.uk/research/rainbow/projects/display_calc/
1•bookofjoe•39m ago•0 comments

Glibc malloc performance degradation with CPU affinity masks

https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/2089789
1•asaiacai•40m ago•0 comments

What Is FedCM?

https://fusionauth.io/blog/what-is-fedcm
1•mooreds•40m ago•0 comments

Visual website feedback and QA tool for agencies, freelancers and product teams

https://huddlekit.com
1•kevinlarsson•41m ago•1 comments