| Chatwoot | Inbox, support, customer/lead communication, SLA surface. | CRM/support operation and approval/read-back patterns. | Candidate reference; license, data, tenancy, and adaptation still need gates. |
| listmonk | Consent-aware email campaigns and engagement. | Messaging authority and campaign state. | Useful subsystem; not a client truth source without reconciliation. |
| AFFiNE / SISO Docs | Knowledge/workspace and document context. | Brief, evidence, and client-facing knowledge surfaces. | Reference/substrate; permissions and tenancy remain important. |
| Teable / Baserow | Database/view/CRUD kernel. | Read-only UI/CRUD first pilot and schema-bound internal tools. | Candidate; provider/data boundaries must be explicit. |
| Postiz | Social publishing and campaign orchestration. | Approval → publish → report atom. | Candidate; external side effects require approval and rollback. |
| Hi.Events / Cal.diy | Events, booking, schedule, attendee/revenue surfaces. | Scheduling and coordination atoms. | Candidate; payment and calendar read-back need direct evidence. |
| Payload / Frappe | Content, CRM/ERP, metadata-driven schema and workflow. | Client-owned data/deployment boundary and scaffolding reference. | Strong references; not automatically Actionist-compatible. |
| Activepieces / Atomic CRM | Workflow/pieces and compact relationship models. | Automation and CRM event crosswalk experiments. | Candidate; connector/action authority must be bounded. |