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Most “AI workspace” pitches are a chat box bolted onto a notes app. FuseBase—formerly Nimbus Note—is aiming bigger: an AI-native Work OS where internal docs, client portals, AI agents, and the apps you build with your own AI tools live in one place. This review covers what that means for builders, which parts sit behind which code, and what to confirm before you pay. It is a read of the listing and the founder’s notes, not a hands-on log.
Who can buy, and until when (checked 6 October 2026, morning SGT): right now this is a Plus Exclusive. The listing says it is “available exclusively to AppSumo Plus members,” and every plan button reads “Buy with Plus.” If you are not a Plus member, you cannot check out today. The early-access timer ends 8 October 2026 at about 01:00 SGT/PHT (noon US Central on 7 October). AppSumo’s tooltip says Plus members get first dibs “before it opens to the public,” but the listing shows no public date or public price, and AppSumo marks this run as a last call. Do not count on a second window.
Plus-member pricing runs from $69 for one code (struck $468) to $690 for ten (struck $8,904). Codes stack without a cap, must be redeemed within 60 days, and carry a 60-day refund. The listing shows 4.6 stars from 589 reviews.
See the FuseBase lifetime deal
What FuseBase is trying to be in 2026
FuseBase began as a notes tool, moved into client collaboration, and has now pivoted hard toward AI. The listing describes four layers:
- Workspaces. Notion-style pages with tables, PDFs, and Figma, Miro, and Looker Studio embeds, plus AI drafting and search.
- Client portals. Branded external spaces—portals, deal rooms, SEO-friendly sites—with per-client permissions.
- AI agents. Agents inside workspaces and portals that answer questions and move tasks.
- Apps and hosting. Build custom apps with AI coding tools, connect them through APIs and MCP, and run hosted Paperclip, n8n, and Firecrawl.
That last layer is the interesting one for AI builders—and the one with the most fine print.
The builder angle: vibecoding on top of your workspace
The pitch is direct: build apps that extend FuseBase with the AI tools you already pay for, and run them on your existing AI subscription or your own API keys instead of buying FuseBase tokens. The listing names ChatGPT, Claude, and VS Code; the founder’s March update adds Cursor, Claude Code, and Antigravity. Those apps can run on their own, inside workspace documents, or inside client portals.
In plain terms, FuseBase wants to be where your vibecoded tools land—say, a client intake form or reporting widget inside the portal your client already logs into.
The deal limits make that concrete. Each code tier includes a count of Frontend apps (features) and Full Stack apps (active): Code 1 gives 5 frontend and 1 full-stack app; Code 3 gives 15 and 3; Code 10 gives 100 and 10. If app building is the reason you are here, the full-stack count is the number to watch, because it caps how many real, running apps you can have at once.
MCP and APIs: where the tiers split
On the plan table, FuseBase MCP first appears at Code 3 ($207). Codes 1 and 2 do not list it. If you want Claude or another MCP client reading and updating your workspace, $69 is the wrong buy.
Other gates worth knowing:
- Code 5 ($345) is the first tier that lists SOC 2, HIPAA, white labeling, and FuseBase managed apps.
- Code 10 ($690) is the only tier on the table that lists FuseBase Work and SEO-friendly apps, along with unlimited AI agents and unlimited workspaces.
Hosted Paperclip, n8n, and Firecrawl: the code counts
The listing says FuseBase can host Paperclip, n8n, and Firecrawl for you, connected to your workspace through APIs and MCP. The plan table only names FuseBase Work (powered by Paperclip) at Code 10. The founder filled in the rest when a buyer asked on 5 October: “for paperclip you need 10 codes, n8n 15, and Firecrawl 20”. So hosted n8n and Firecrawl sit beyond the ten-code table, and you would need to stack past Code 10 to reach them.
AI credits vs your own subscription
Every tier ships monthly AI allowances: Code 1 lists 5 agents, 1,000 AI requests, and 1,000 automation credits; Code 3 lists 20 agents, 10,000 requests, and 15,000 credits; Code 10 lists unlimited agents, 100,000 requests, and 200,000 credits.
The confusion is whether those credits power FuseBase Work. A 10-code buyer (TetanicRaptor) who tried to set up Paperclip on 5 October wrote: “there is no way to use “ai credits” to power the instance. Can ai credits be used or is it only sub-adaptors or BYOK?” The founder’s answer elsewhere: “Paperclip works with your subscription accounts.” Plan for your own Claude, GPT, or API costs on top of the deal.
Client portals as an AI-native front door
Portal counts scale by tier: 1 portal and 5 client accounts on Code 1, 15 portals and 75 client accounts on Code 3, 30 portals on Code 5, and 100 portals with unlimited client accounts on Code 10. Codes stacked beyond 10 each add 2 more portals, plus 3 members, 3 guests, 100 GB of storage, and 1,500 OCR records.
The founder is upfront that reselling what you build in FuseBase has been postponed—now a stated 2027 goal. Packaging FuseBase apps as a product is not on the table today.
Who this suits
A good fit if you run client work and want internal docs, branded portals, and AI agents in one place; if you already pay for an AI coding tool and will build your own apps through MCP; and if you buy at least Code 3. The founder told one buyer that custom domains start at Tier 5.
Probably skip if you want an Evernote-style notes app (the product has moved well past that); if you need native Android or Windows apps; if you expect team members on Code 1 (the founder says Tier 1 is for personal use, without invited members); or if you need resale rights for what you build.
Older buyers loved it; recent owners raise these issues
Recent public discussion is thin, and this is not a product with fresh buzz. Almost everything from the past month is on AppSumo, from existing owners reacting to the 4–5 October relaunch. Both reviews posted in that time are critical (3★ and 1★). The 4.6 rating across 589 reviews mostly reflects earlier campaigns.
Earlier reviews (June 2026, before the current relaunch): one 5-star reviewer (JasonZorn, 11 June) said it “has quickly become the central nervous system for my client workflows.” Another (MeditatingSurgeon, 10 June) wrote that “FuseBase integrates perfectly with Claude and I actually use my internal workspace as memory for Claude,” while noting “a little bit of a learning curve.”
Recent owners (5 October 2026, UTC):
- Drift and speed. A 1-star reviewer (learrn) who bought 10 codes said the tool “was extremely slow and freezes all the time” and that it “was not a team management and collaboration any more.”
- Stacked limits. One stacker reported their account showing “28 members, 84 guests, 1 TB of storage… and 16,000 OCR records” instead of the listed 10-code limits; the founder pointed them to support.
- No native apps. A 3-star reviewer (Abdul_) asked FuseBase to “prioritize a modern Android app and a proper Windows version.” The founder suggested building a mobile app yourself through MCP with a Claude or GPT subscription. That works for builders, and less so for everyone else.
Pros and cons
Pros
- One platform for internal workspaces, branded client portals, AI agents, and custom apps.
- MCP and APIs from Code 3, plus build-with-your-own-AI-tools positioning.
- Codes stack without a cap; 60-day refund; existing accounts allowed.
Cons
- MCP is not in Codes 1–2; Paperclip needs 10 codes, n8n 15, Firecrawl 20.
- AI credits may not power FuseBase Work; budget for your own subscription.
- Recent reviews flag slowness, product drift, and stacked limits not matching the listing.
- No native Android or Windows app; resale postponed to a 2027 goal.
Verdict
FuseBase is an ambitious AI workspace deal, and an honest read has to cover both halves. Earlier buyers called it the hub of their client work; recent owners report speed problems and confusion over limits. For builders, the real entry point is three codes at $207, where MCP appears. Ten codes ($690) is the floor for Paperclip. This is a Plus-only buy until the timer ends around 01:00 SGT on 8 October, so if you are not on Plus, skip it or decide quickly. If you buy, redeem right away, check your limits after stacking, and treat the 60-day refund window as your real test.
FAQ
Is FuseBase the same as Nimbus Note?
Yes. FuseBase is the rebrand of Nimbus Note. Previous buyers can stack new codes on their account.
Which code includes MCP?
Code 3 ($207) and above, per the plan table.
Can I use my own AI keys?
For app building and Paperclip, yes. The founder says Paperclip works with your subscription accounts. Do not count on the bundled AI credits to power it.
Can I buy it if I am not an AppSumo Plus member?
Not right now. The listing is limited to Plus members, and the buttons read “Buy with Plus.”
When does the deal end?
The Plus early-access timer ends around 8 October 2026, 01:00 SGT/PHT. No public window or public price is listed after that.
Get the FuseBase lifetime deal
Affiliate Disclosure: I may earn a commission if you purchase through my link—at no extra cost to you. Information and pricing are based on the AppSumo listing at the time of writing and may change.
