--- title: "Tungsten vs Competitors — Why Choose Tungsten for Part 21J Certification | Tungsten" description: "Detailed comparison of Tungsten certification software vs. Sassofia and other competitors. See why Part 21J design offices choose Tungsten: specialized workflows, transparent pricing, fast implementation, and aerospace domain expertise." canonical_url: "https://www.tungsten.aero/comparison" meta: author: "Altus Aeronautica Ltd" keywords: "Tungsten vs Sassofia, certification software comparison, Part 21J software, EASA compliance, aerospace SaaS comparison, design office software" "og:description": "Detailed comparison of Tungsten certification software vs. Sassofia and other competitors. See why Part 21J design offices choose Tungsten: specialized workflows, transparent pricing, fast implementation, and aerospace domain expertise." "og:image": "https://www.tungsten.aero/img/og-image.png" "og:image:alt": "Tungsten — Aerospace Certification Software for EASA Part 21J Design Offices" "og:image:width": "1200" "og:title": "Tungsten vs Competitors — Why Choose Tungsten for Part 21J Certification" "twitter:description": "Purpose-built certification software that replaces spreadsheets and manual approval chains. Structured document workflows, audit trails, and compliance automation for airworthiness engineers." "twitter:image": "https://www.tungsten.aero/img/og-image.png" "twitter:title": "Tungsten — Certification Software for EASA Part 21J Design Offices" --- > Index of every page on this site: [llms.txt](https://www.tungsten.aero/llms.txt) # Tungsten vs Competitors Why Part 21J design offices choose Tungsten — specialized workflows, transparent pricing, and aerospace domain expertise. ## **The Tungsten Advantage** - **Purpose-built for Part 21J** — workflows and approvals tailored to EASA design office certification, not a generic tool with aerospace add-ons - **Predictable, flat-rate pricing** — £500/month (Design Office) or £1,000/month (Enterprise), both with unlimited users and projects, no per-seat surcharges, and a 3-month money-back guarantee - **Same-day implementation** — no complex IT setup, no weeks of configuration; start your first project today - **Built by aerospace engineers** — domain expertise in Part 21J workflows, approval chains, and regulatory requirements ### **Purpose & Focus** **Designed for EASA Part 21J Design Offices** **Tungsten ** Yes — workflows, templates, and approvals are tailored exclusively to Part 21J certification **Sassofia / Others ** Sassofia: General aerospace compliance tool; serves multiple certification regimes. Not Part 21J-specific. **Aerospace domain expertise in design** **Tungsten ** Yes — built by aerospace engineers who understand real certification workflows **Sassofia / Others ** Sassofia: Generic document management with aerospace add-ons **Regulatory compliance (EASA-focused)** **Tungsten ** Yes — embedded regulatory knowledge for Part 21J submission requirements **Sassofia / Others ** Sassofia: Broader compliance coverage, less Part 21J specialisation ### **Core Features** **Structured document workflows** **Tungsten ** Yes — version control, approval chains, audit trails baked in **Sassofia / Others ** Sassofia: Document storage with workflow add-ons **Snapshot reviews (point-in-time review capture)** **Tungsten ** Yes — capture entire project state for formal certification review **Sassofia / Others ** Sassofia: Document versioning; no project-level snapshots **Task tracking & deadline management** **Tungsten ** Yes — integrated task assignment with status and deadline visibility **Sassofia / Others ** Sassofia: Limited task tracking; requires external tools **Role-based access control** **Tungsten ** Yes — fine-grained permissions for engineers, reviewers, approvers, observers **Sassofia / Others ** Sassofia: Basic user roles; less granular **Full-text search with project filtering** **Tungsten ** Yes — search projects by type, classification, keywords, and document content **Sassofia / Others ** Sassofia: Document-level search; limited project filtering ### **Pricing & Commercial Model** **Flat-rate per-organisation pricing** **Tungsten ** Design Office £500/month, Enterprise £1,000/month (both billed annually) — unlimited users, unlimited projects **Sassofia / Others ** Sassofia: Per-seat or per-project licensing; cost scales with team size **No per-seat surcharges** **Tungsten ** Included — all engineers, approvers, observers unlimited **Sassofia / Others ** Sassofia: Typical per-user cost £50–150/month **Feature gating** **Tungsten ** None — all features included in every plan **Sassofia / Others ** Sassofia: Advanced features require premium tiers **Transparent pricing** **Tungsten ** Yes — no hidden costs; all features disclosed upfront **Sassofia / Others ** Sassofia: Feature availability depends on tier; pricing opacity ### **Implementation & Onboarding** **Time to first certification project** **Tungsten ** Typically same day — create organisation, invite team, start project **Sassofia / Others ** Sassofia: 1–2 weeks; requires configuration, integrations, training **No complex IT integration required** **Tungsten ** Yes — web-based, zero IT overhead **Sassofia / Others ** Sassofia: Often requires IT setup, data migration, API integration **Supports existing workflows** **Tungsten ** Yes — designed to slot into your current process, not replace it **Sassofia / Others ** Sassofia: Often requires process re-engineering to fit the tool **Ongoing support** **Tungsten ** Dedicated support team familiar with Part 21J workflows **Sassofia / Others ** Sassofia: Generic support; less aerospace domain knowledge ### **Security & Compliance** **Data residency (EU/UK)** **Tungsten ** Yes — AWS infrastructure in European data centres **Sassofia / Others ** Sassofia: Varies; may use US/global data centres **Encryption (at rest & in transit)** **Tungsten ** Yes — standard for all data **Sassofia / Others ** Sassofia: Standard, but secondary to workflow features **Audit trail (comprehensive)** **Tungsten ** Yes — every action logged; organisation-scoped activity trail **Sassofia / Others ** Sassofia: Basic logging; not always certification-grade **GDPR compliance** **Tungsten ** Yes — privacy-by-design, data retention controls **Sassofia / Others ** Sassofia: Compliant, but not tailored to aerospace **Backup & disaster recovery** **Tungsten ** Yes — automated daily backups **Sassofia / Others ** Sassofia: Standard backup policies ### **Flexibility & Enterprise Needs** **Self-hosted / on-premises deployment** **Tungsten ** Available for enterprise customers — contact for custom quote **Sassofia / Others ** Sassofia: Limited; primarily SaaS-only **Air-gapped deployment (disconnected networks)** **Tungsten ** Available for enterprise — enables offline operation **Sassofia / Others ** Sassofia: Not typically supported **Custom API integrations** **Tungsten ** Available for enterprise — integrate with CAD, ERP, MES systems **Sassofia / Others ** Sassofia: Limited API flexibility **Data export options** **Tungsten ** Full project export in standard formats (PDF, spreadsheet, archive) **Sassofia / Others ** Sassofia: Document-level export; less comprehensive ### **Ready to experience the difference? ** Most design offices see improved workflow efficiency and compliance confidence within the first week. Start a free trial and migrate a recent certification project to see it in action. [**Start Free Trial **](https://app.tungsten.aero) [**Book a Demo **](https://www.tungsten.aero/contact) ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.tungsten.aero/#website","@type":"WebSite","description":"Purpose-built certification software for EASA Part 21J design offices. Structured document workflows, approvals, and audit trails — so your engineers can focus on engineering, not paperwork.","name":"Tungsten","url":"https://www.tungsten.aero/","publisher":{"@id":"https://www.tungsten.aero/#identity"}},{"@id":"https://www.tungsten.aero/comparison#webpage","@type":"WebPage","description":"Detailed comparison of Tungsten certification software vs. Sassofia and other competitors. 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