Causo vs sideOS
Causo and sideOS are both AI assistants tools. Causo is aimed at small businesses and freelancers, while sideOS is aimed at freelancers and developers. Only Causo has a free plan.
AI prospecting agent that researches leads with sources, plus MCP
Voice-driven Mac agent in the notch with local dictation and meetings
| Pricing | Freemium · $19 | Paid |
| Starting price | $19/mo | Not published |
| Free plan | Yes | No |
| Free trial | — | — |
| Built for | Small businesses, Freelancers, Agencies | Freelancers, Developers, Small businesses |
| Platforms | web | macos |
| Country | GB · 2025 | — |
| Rating | — | — |
Choose Causo if
Founders and small sales teams prospecting into niche markets who want sourced research rather than raw database filters.
- Finds companies in niches that static databases miss
- Every match comes with sources you can check
- Low $19 entry plan and a free start without a card
Look elsewhere if: Sales teams that need a huge contact database, CRM sync and full multichannel sequencing (Apollo, ZoomInfo).
Choose sideOS if
Mac professionals who want a private voice agent, dictation and meeting notes in one app they pay for once.
- One-time licence with all future updates and no subscription
- No account and no sideOS server between you and the model
- Dictation and meeting transcription stay on the Mac
Look elsewhere if: Windows or mobile users and teams that need shared meeting notes or admin controls (Granola, Raycast).
Causo vs sideOS pricing
Causo
- Free$050 one-time tokens, 20 agent messages, 1 mailbox, no card
- Let me try$19/mo100 tokens/mo, unlimited agent messages, CSV export
- Founder's Delight$79/mo500 tokens/mo, up to 3 mailboxes, top-ups $0.30/token
- Serious Business$259/mo2,000 tokens/mo, up to 5 mailboxes, top-ups $0.30/token
- EnterpriseCustomCustom tokens, unlimited mailboxes, team workspace
sideOS
- Lifetime licence$89.90One-time; one Mac at a time, every future update included
- AI model usageVariesPaid to your own provider, about 2 to 5 cents per command
Causo · Key features
- Plain-language ideal customer search across public web sources
- Sourced evidence explaining why each company matches
- Decision-maker lookup with email verification
- Research-based outreach drafts you edit before sending
- Connected mailboxes and one-token outreach sequences
- Remote MCP server for Claude, ChatGPT, Cursor and Codex
Cons
- No CRM integration named on the site
- Tokens run out quickly on large prospect lists
- Prices are marked early bird and may change
sideOS · Key features
- Hold-to-talk agent that reads the screen, clicks, types and runs AppleScript
- On-device dictation into any app in 62 languages at no extra cost
- Meeting recording for Zoom, Meet and Teams with on-device Whisper and speakers
- Background tasks with web search, file access and approved shell commands
- Reminders that can complete a task before they fire
- One-click MCP connections for Gmail, Calendar, Notion, Slack and GitHub
Cons
- Apple Silicon Macs with macOS 14 or later only
- Agent use adds API costs unless you run a local model
- No free trial or refund window stated on the site
Causo vs sideOS: FAQ
Do Causo and sideOS have a free plan?
Causo has a free plan. sideOS has no free plan.