Gissur Runarsson

I build Bersyn: see who ChatGPT, Claude, Gemini and Perplexity recommend in your category, and who they name instead of you. Type your domain at bersyn.com, 15 seconds, no signup.

Reykjavík Iceland Joined on Feb 5, 2026 gissur@qualitas.is https://www.bersyn.com/

Education

University of Iceland

Pronouns

He/him/his

Work

Sales and marketing at Tero by day. Building Bersyn, AI recommendation intelligence, by night.

Gissur Runarsson

Jul 15

Bersyn is live on Product Hunt today

#ai #startup #marketing #buildinpublic

1 min read

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Gissur Runarsson

Jul 13

AI keeps recommending my competitors instead of me. Wednesday I launch Bersyn on Product Hunt.

#buildinpublic #ai #saas #startup

1 min read

Gissur Runarsson

Jul 11

I'm launching Bersyn on Product Hunt next Wednesday

#startup #ai #buildinpublic #saas

1 min read

Gissur Runarsson for Bersyn

Jul 10

We asked AI for the best CRM 80 times. Attio, the CRM startups love, was named twice.

#ai #saas #startup #marketing

3 min read

Gissur Runarsson for Bersyn

Jul 10

We asked AI for the best email tool 40 times. Beehiiv barely showed up. Then we asked about newsletters.

#ai #saas #marketing #startup

5 min read

Gissur Runarsson for Bersyn

Jul 10

We asked AI for the best project management tool 40 times. Linear, the one engineers love, was named twice.

#ai #saas #productivity #startup

3 min read

Gissur Runarsson

Jul 10

I watched a shared inbox tool go from 10 out of 10 to zero on ChatGPT just by rewording the question

#ai #saas #buildinpublic #startup

2 min read

Gissur Runarsson for Bersyn

Jul 9

We asked AI to recommend tools in three SaaS categories 20 times each, and the shape of the answers told us which ones a challenger can still win

#ai #saas #startup #marketing

4 min read

Gissur Runarsson for Bersyn

Jul 9

We reworded one buyer question and watched a shared inbox tool drop from 10 out of 10 to zero on ChatGPT

#ai #saas #marketing #seo

3 min read

Gissur Runarsson for Bersyn

Jun 30

Why AI recommends the same tools every time, and which slots you can actually win

#ai #marketing #startup #seo

3 min read

Gissur Runarsson for Bersyn

Jun 29

I asked four AI models which database to use in 2026. Neon already won. Four challengers are invisible.

#ai #database #webdev #saas

2 min read

Gissur Runarsson for Bersyn

Jun 26

I asked four AI models which observability tool to use in 2026. They keep naming Datadog and Splunk, and never Better Stack.

#observability #devops #ai #startup

4 min read

Gissur Runarsson for Bersyn

Jun 26

I asked four AI models which notification infrastructure to use in 2026. Three of them still send you to Twilio.

#webdev #ai #saas #startup

3 min read

Gissur Runarsson for Bersyn

Jun 25

I asked four AI models where to deploy a SaaS app in 2026. Three of them never mention Railway, Render or Fly.

#webdev #devops #ai #startup

3 min read

Gissur Runarsson for Bersyn

Jun 24

ChatGPT and Claude flatly disagree about which developer tools to recommend. I have the receipts.

#ai #devtools #chatgpt #startup

4 min read

Gissur Runarsson for Bersyn

Jun 24

I asked four AI models which authentication tool to use, then scanned the challengers. Auth0 and Okta own the answer. Here is who AI ignores.

#ai #saas #authentication #geo

5 min read

Gissur Runarsson

Jun 24

Day 34 of trying to get 20 paying customers in 40 days. Still at 0. Here is what changed.

#buildinpublic #startup #ai #marketing

4 min read

Gissur Runarsson

May 27

Day 7 of trying to get 20 paying customers in 40 days. Currently at 0.

#startup #buildinpublic #marketing #ai

2 min read

Gissur Runarsson for Bersyn

May 22

We ran Bersyn on Bersyn — what ChatGPT, Claude, Perplexity and Gemini are saying about our own brand

#showdev #ai #geo #saas

8 min read

Gissur Runarsson for Bersyn

May 22

Bersyn — what the name means, where it came from, and what it is not

#saas #startup #marketing #branding

7 min read

Gissur Runarsson for Bersyn

May 22

We scanned 8 B2B SaaS companies across 5 categories. ChatGPT named the same 12 brands in every answer.

#geo #ai #saas #startup

4 min read

Gissur Runarsson

Apr 13

Your SaaS is probably invisible to AI and you dont know it

#saas #ai #marketing #webdev

2 min read

Gissur Runarsson

Mar 31

I opened up free AI scans — here's what AI actually says about your product

#ai #saas #webdev #productivity

2 min read

Gissur Runarsson

Mar 22

I asked ChatGPT, Claude, Perplexity, and Gemini about 10 SaaS products. Here's what they got wrong.

#saas #ai #startup #marketing

4 min read

Gissur Runarsson

Mar 3

Why Building a Custom CSV Import Feature Takes Months — And How Importkit Solves It in Minutes

#react

4 min read

Gissur Runarsson

Feb 25

AI systems are already describing your product to buyers

#b2b #saas #startup #ai

2 min read

Gissur Runarsson

Feb 21

I Asked ChatGPT, Perplexity, Claude, and Gemini About My SaaS. Here’s What They said!

#saas #ai #marketing #startup

3 min read

Gissur Runarsson

Feb 20

How to Add CSV Upload Functionality to Your React SaaS App in 2026

4 min read

Gissur Runarsson

Feb 15

AI Is Quietly Deciding Which SaaS Tools Exist

#saas #startup #ai #marketing

2 min read

Gissur Runarsson for ImportKit

Feb 14

ImportKit vs Flatfile: The Best Affordable Alternative for Small Startups in 2026

#webdev #react #ai #programming

9 min read

Gissur Runarsson

Feb 8

How to Use ImportKit: Add CSV/Excel Import to Your React App in 10 Minutes

#react #typescript #javascript #webdev

5 min read

Gissur Runarsson

Feb 5

How I Replaced Weeks of CSV Import Code With One React Component

#saas #react #csv #devops

2 min read

2 Week Community Wellness Streak

1 Week Community Wellness Streak

Writing Debut

ImportKit

Bersyn

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