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The stack, ranked by builders.

Counts come from the stacks members list on their Builds. Nobody pays for placement. Gold means Art uses it in the portfolio.

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1
ClaudeModelArt uses it

The model behind most of what Art builds.

1
builders
2
Claude CodeCoding agentArt uses it

The agent that runs the whole R2F portfolio, including this site and its AI staff.

1
builders
3
RailwayHostingArt uses it

Hosts SlotMaps.

1
builders
4
ReplitApp builderArt uses itaffiliate

Table 1 and SlotMaps were first built on Replit's agent.

1
builders
5
ResendemailArt uses it

Sends the R2F newsletter and site email (since October 2026).

1
builders
6
StripePaymentsArt uses it

Payments across the portfolio.

1
builders
7
VercelHostingArt uses it

Hosts rounderstofounders.com.

1
builders
8
ApifyAdded by members
1
builders
9
ClerkAdded by members
1
builders
10
Cloudflare D1Added by members
1
builders
11
Cloudflare WorkersAdded by members
1
builders
12
DrizzleAdded by members
1
builders
13
ExpoAdded by members
1
builders
14
ExpressAdded by members
1
builders
16
MailgunAdded by members
1
builders
17
Neon PostgresAdded by members
1
builders
18
Next.jsAdded by members
1
builders
19
ReactAdded by members
1
builders
20
Spotify APIAdded by members
1
builders
21
TicketNetwork APIAdded by members
1
builders
22
ArcadsVideoArt uses it

AI video and ad creative.

0
builders
23
CloudflareHostingArt uses it

DNS, Workers and the D1 database under the R2F community.

0
builders
24
CursorEditorArt uses it

AI code editor. Art's step up after Replit.

0
builders
25
GitHubDevArt uses it

Every AI seat works by pull request.

0
builders
26
BeehiivNewsletteraffiliate

Ran the R2F newsletter until October 2026.

0
builders
27
GummySearchResearch

Reddit audience research (Tool Tuesday pick).

0
builders

Links marked “affiliate” may earn R2F a commission or credits at no cost to you.