Soleur vs. Tanka: Memory AI vs. Execution Intelligence
Tanka remembers what your team said. Soleur executes across 9 departments and remembers what was decided. The difference determines what memory-native AI actually means for solo founders.
Both Tanka and Soleur make the same surface claim: AI that never forgets. Tanka markets itself as your "AI co-founder with long-term memory" — a memory-native platform that captures everything your team has said, decided, and discussed across Slack, Gmail, Notion, and WhatsApp. Soleur is the Company-as-a-Service platform — 66 agents, 73 skills, and a compounding knowledge base organized across 8 business departments.
The memory claim is where the similarity ends. What each system remembers, and what it does with that memory, reveals two categorically different tools.
What Tanka Actually Is
Tanka is a memory-native AI messenger for teams. Its core technology — EverMemOS, launched in September 2025 — connects to existing communication tools and turns past conversations into searchable, persistent organizational memory. When a founder needs to recall what was discussed in a meeting three weeks ago, or surface a decision buried in a Slack thread, Tanka retrieves it.
The platform's Memory Transfer feature moves role-specific knowledge between teammates. Tanka's AI Smart Reply drafts context-aware messages based on what the system knows about past conversations. The Fundraising Agent, launched in September 2025, helps founders draft pitch materials, practice investor interviews, and request warm introductions through a venture capital network partnership.
Tanka positions this as "AI co-founder" functionality: it is the company's memory layer — a searchable record of everything the team has ever communicated. EverMemOS claimed a Locomo score of 92.3% at launch, which Tanka described as the highest reported benchmark result for long-context memory systems at the time.
What Soleur Actually Is
Soleur is the Company-as-a-Service platform. 66 agents, 73 skills, and a compounding knowledge base organized across 8 business departments — engineering, marketing, legal, finance, operations, product, sales, support, and community.
The compounding knowledge base is not a record of what was said. It is a git-tracked directory of Markdown files — architectural decisions, brand guidelines, competitive analyses, legal compliance requirements, financial models, and product roadmaps — that agents read and write to with every session. When the legal agent documents a compliance requirement, the engineering agents reference it before building. When the brand-architect agent defines the brand guide, every piece of marketing copy reflects it. When the competitive intelligence agent updates the market landscape, the product agent incorporates it into the roadmap.
Every decision the founder makes becomes institutional memory that the entire organization inherits. The twenty-first session benefits from everything the previous twenty sessions produced.
Communication Memory vs. Execution Memory
This is the architectural distinction that determines which tool solves your actual problem. Tanka captures what was communicated. Soleur captures what was decided and executes on it.
Tanka's memory is retrievable: search for a past conversation, recall a decision buried in an email thread, avoid re-explaining context to a new team member. It solves organizational amnesia — the cost of re-finding and re-explaining information that already exists somewhere in the company's communication history.
Soleur's memory is generative: the legal compliance requirement documented in session 4 changes what the engineering agents build in session 19. The competitive analysis from session 7 shapes the product roadmap in session 12. The brand guide written in session 1 governs every marketing asset produced from that point forward. The memory does not just retrieve — it influences every subsequent execution.
A solo founder using Tanka has a searchable record of everything their team discussed. A solo founder using Soleur has an organization that gets smarter with every decision they make.
The Solo Founder Problem Each Solves
Tanka's primary value proposition is team memory. The platform is designed for teams: Memory Transfer explicitly moves knowledge between teammates; AI Smart Reply drafts messages in a team communication context; the pricing structure (free under 50 users, $299/month for teams of 50+) reflects a team-centric model.
A solo founder without a team gets the memory retrieval capability, but the team-collaboration features have no team to collaborate with. Tanka's planned Agent Store will extend functional agents for GTM, hiring, and product management into the platform — narrowing the execution gap for those specific domains. But the agents are downstream of the memory layer. The communication infrastructure is the primary product.
Soleur is built specifically for one person replacing an entire organization. The brainstorm-to-ship lifecycle runs a solo founder through the work that a CEO, CMO, CLO, CFO, COO, CPO, CRO, and CCO would collectively handle — not by retrieving what was said, but by executing what needs to be done. Legal contracts get drafted. Competitive analyses get run. Financial models get built. Engineering reviews get completed. The founder provides judgment at decision gates. Agents handle execution.
Where They Differ
Memory Architecture
Tanka: communication-layer memory. EverMemOS connects to Slack, Gmail, Notion, and WhatsApp and makes conversation history searchable and retrievable. Memory lives in what the team communicated.
Soleur: execution-layer memory. A git-tracked knowledge base that agents write to and read from across sessions. Memory lives in what was decided, built, and learned — not in conversation logs, but in structured artifacts that directly influence future agent behavior.
Primary Use Case
Tanka: recalling and surfacing past conversations and decisions for teams. Making organizational memory searchable.
Soleur: executing work across 8 business domains with agents that compound organizational knowledge with every session.
Agent Scope
Tanka: Fundraising Agent (September 2025), with GTM, hiring, and product management agents in the roadmap Agent Store.
Soleur: 66 agents across 8 departments — engineering, marketing, legal, finance, operations, product, sales, support, and community — running in the founder's development environment with access to the full compounding knowledge base.
Platform Model
Tanka: memory-native AI messenger. The foundation is communication infrastructure; agents are the extension layer.
Soleur: execution-native AI organization. The foundation is agent-driven workflow; the knowledge base is the compounding memory layer.
Pricing
Tanka: free for teams under 50 users. $29/month (Plus), $199/month (Pro) for individuals with higher credit allocations. $299/month for teams of 50 or more.
Soleur: open-source, free platform. Your costs are the Claude API credits the agents consume.
Who It Is Built For
Tanka: teams dealing with organizational amnesia — distributed teams and growing startups where knowledge management across communication tools is the bottleneck.
Soleur: solo founders who need to replace a full organization with AI — not to remember what was said, but to execute what needs to be done across every department.
When Tanka Is the Right Choice
If the primary problem is organizational memory across a distributed team — critical decisions getting lost in Slack threads, new team members needing to reconstruct context that already exists, cross-tool conversation history being unsearchable — Tanka addresses that problem directly.
Tanka also makes sense if the workflow is already centered on team messaging and communication tools and the value needed is memory layered on top of that existing infrastructure. EverMemOS's approach to making communication history retrievable and actionable is purpose-built for this.
When Soleur Is the Right Choice
If the bottleneck is not memory retrieval but execution across multiple business domains — legal work that does not get done, competitive analysis that never happens, financial models that are not built, engineering that ships without code review — Soleur covers the work, not just the memory of the work.
Solo founders without a team get the full value of Soleur's agent organization from day one. There is no team-collaboration layer to route around — the agents execute directly from the founder's judgment.
And when execution produces institutional memory — when the legal agent documents a compliance requirement that shapes what engineering builds next — that memory is generative, not retrievable. It does not surface the past. It improves the future.
| What you need | Tanka | Soleur |
|---|---|---|
| Searchable conversation history | Yes | No |
| Memory across Slack, Gmail, Notion | Yes | No |
| AI Smart Reply for team messaging | Yes | No |
| Memory Transfer between teammates | Yes | No |
| Fundraising Agent | Yes | No |
| Pre-built agents for legal, marketing, finance | No | Yes |
| Cross-domain compounding knowledge base | No | Yes |
| Full workflow lifecycle (brainstorm through ship) | No | Yes |
| Solo-founder-first design | No | Yes |
| Open-source | No | Yes |
| Pricing | Free (<50 users) / $29–199/mo | Free (API costs) |
FAQ
Q: Can Tanka and Soleur be used together?
Yes, with distinct roles. Tanka handles communication memory — making team conversations and decisions retrievable. Soleur handles organizational execution — running agents across legal, marketing, finance, engineering, and other domains. A founder with a small team could use Tanka to index communication history while using Soleur for the cross-domain execution work. The knowledge bases serve different functions: Tanka's is communication-derived; Soleur's is decision-derived.
Q: Tanka claims to be an "AI co-founder." What does that mean in practice?
Tanka's "AI co-founder" positioning refers to its persistent memory: unlike most AI tools that forget past conversations, Tanka retains organizational context across sessions. A co-founder who remembers everything discussed is the framing. In practice, Tanka retrieves and surfaces past information rather than executing new work. The co-founder metaphor describes the memory persistence, not the execution breadth.
Q: How does Soleur's knowledge base differ from Tanka's memory?
Tanka's memory captures what was communicated — conversations, messages, and documents that already exist in tools like Slack and Gmail. Soleur's knowledge base captures what was decided and why — brand guides, competitive analyses, architectural decisions, compliance requirements, financial models — as structured artifacts that agents write to and reference in future sessions. Tanka surfaces what already happened; Soleur's knowledge base changes what happens next.
Q: Does Tanka's planned Agent Store change the comparison?
Tanka's planned Agent Store will extend functional agents for GTM, hiring, and product management into the platform. When shipped, this will narrow the execution gap for those specific domains. It will not address the cross-domain coherence that Soleur's compounding knowledge base provides — an agent built on top of a communication memory layer operates from what was said, not from the accumulated organizational intelligence that Soleur's cross-department knowledge base produces.
