Building an Open-Source Alternative to Apple’s Custom Silicon: A Call for Collaboration

How we’re creating a community-driven chip design process — and why we need your help to make it better.

The Problem: Closed Silicon Dominates

Apple’s custom silicon — from the A-series chips in iPhones to the M-series in Macs — has redefined what’s possible in consumer electronics. Their vertical integration, exclusive access to cutting-edge fabrication nodes, and deep software-hardware co-design give them a multi-year lead in performance, power efficiency, and user experience.

But here’s the catch: This dominance comes at a cost.

• Innovation is siloed. Only a handful of companies (Apple, Qualcomm, Samsung, etc.) can afford to design chips at this level.
• Access is limited. Researchers, startups, and hobbyists are locked out of the most advanced tools and processes.
• The ecosystem is closed. Apple’s chips are optimized for their software, their devices, and their vision — not the broader community.

What if we could democratize this? What if there were an open-source alternative — a chip design process that anyone could contribute to, learn from, and build upon?

Introducing Our Open-Source Chip Design Framework

Over the past few months, I’ve been working on a framework for an open-source chip design process that aims to be comparable to Apple’s custom silicon — but built by the community, for the community. The goal isn’t to replace Apple’s chips (yet!) but to create a transparent, collaborative, and accessible alternative that lowers the barrier to entry for high-performance chip design.

What We’ve Built So Far

Our framework breaks the process into six core phases, each with open-source tools and workflows:

1. Architecture & ISA Definition

• Using RISC-V (the open, modular ISA) as our foundation.
• Defining custom extensions for AI, graphics, or other accelerators.
• Benchmarking against Apple’s chips to set performance targets.

2. RTL Design & Verification

• Writing Register Transfer Level (RTL) code in Verilog, SystemVerilog, or Chisel.
• Verifying designs with Yosys, Verilator, SymbiYosys, and Cocotb.

3. Physical Design & Tapeout

• Using OpenROAD, KLayout, and Magic for place-and-route and layout.
• Targeting open foundries like SkyWater (130nm) or Google’s OpenMPW program.

4. Fabrication & Testing

• Leveraging open PDKs (Process Design Kits) and shuttle programs to manufacture test chips.
• Validating performance, power, and thermal characteristics.

5. Software & Ecosystem Integration

• Porting LLVM/GCC compilers and Linux/Zephyr RTOS to support the chip.
• Developing drivers for custom accelerators (e.g., NPUs, GPUs).

6. Community & Collaboration

• Building a sustainable open-source ecosystem with clear documentation, tutorials, and contribution guidelines.

You can explore the full framework here (link to your GitHub repo or project page).

Why This Matters

1. Democratizing Chip Design

Today, designing a high-performance chip requires billions of dollars, proprietary tools, and exclusive foundry access. Our framework aims to lower these barriers by:

• Using open-source tools (no expensive licenses).
• Targeting accessible foundries (e.g., SkyWater’s 130nm node).
• Providing clear documentation to onboard new contributors.

2. Fostering Innovation

Apple’s chips are optimized for their ecosystem. An open-source alternative could:

• Enable niche use cases (e.g., AI for edge devices, ultra-low-power IoT chips).
• Allow researchers and startups to experiment with custom architectures.
• Accelerate education by giving students hands-on experience with real chip design.

3. Creating a Sustainable Ecosystem

This isn’t just about hardware — it’s about building a community that can:

• Iterate rapidly (no single company controls the roadmap).
• Share knowledge (open documentation, tutorials, and best practices).
• Collaborate globally (contributors from academia, industry, and hobbyist communities).

Where We Need Your Help

This project is far from complete, and that’s where you come in. Here’s how you can contribute:

1. Feedback on the Framework

• Does the 6-phase process make sense? Are we missing critical steps?
• Are there better tools or workflows we should adopt?
• How can we improve documentation to make it easier for newcomers?

2. Technical Contributions

We need help in every phase of the process:

• Architecture: Help define the ISA or microarchitecture (e.g., custom RISC-V extensions).
• RTL Design: Contribute Verilog/Chisel code for cores, caches, or accelerators.
• Verification: Write testbenches, formal proofs, or compliance tests.
• Physical Design: Improve place-and-route scripts or layout optimizations.
• Software: Port compilers, OS kernels, or drivers to support the chip.
• Testing: Benchmark performance and power efficiency.

3. Community Building

• Spread the word: Share this project with colleagues, students, or open-source communities.
• Organize workshops: Host hackathons or tutorials to onboard new contributors.
• Partner with institutions: Collaborate with universities, research labs, or open-source foundations (e.g., RISC-V International).

4. Foundry & Fabrication Support

• If you have access to foundries (e.g., TSMC, GlobalFoundries) or experience with tapeouts, we’d love to hear from you!
• Help us navigate open foundry programs (e.g., SkyWater, OpenMPW) to get our designs fabricated.

Room for Improvement

This is a work in progress, and there are plenty of gaps to fill. Here are some of the biggest challenges we’re facing:

1. Performance Gap

Apple’s chips are years ahead in performance and power efficiency. To close this gap, we need:

• Better architectural optimizations (e.g., out-of-order execution, branch prediction).
• Custom accelerators (e.g., for AI, graphics, or cryptography).
• Access to advanced nodes (e.g., 7nm, 5nm). Currently, we’re limited to 130nm–28nm with open foundries.

2. Tooling Limitations

Open-source EDA tools (e.g., OpenROAD, Yosys) are powerful but immature compared to commercial tools (e.g., Cadence, Synopsys). We need:

• More robust verification (e.g., formal methods, coverage-driven testing).
• Better physical design tools (e.g., timing closure, DFM optimizations).
• Integration with commercial tools (where open-source falls short).

3. Ecosystem Maturity

Apple’s chips benefit from decades of software optimization (e.g., iOS, macOS, Metal API). We need to:

• Port existing software (e.g., Linux, LLVM) to our designs.
• Develop custom drivers for accelerators.
• Build a benchmarking suite to measure performance fairly.

4. Community Growth

This project will only succeed if it gains traction. We need:

• More contributors (architects, designers, verification engineers, software developers).
• Clear onboarding paths for newcomers.
• Partnerships with universities, research labs, and industry players.

How to Get Involved

If you’re excited about this project, here’s how to join the effort:

1. Star and Fork the Repo: Link to GitHub
2. Join the Discussion: Share your thoughts in the comments below.
3. Pick an Issue: Browse our GitHub Issues for tasks that match your skills.
4. Contribute Code: Submit pull requests for RTL, verification, or software.
5. Spread the Word: Share this article on social media or with your network.

A Vision for the Future

Imagine a world where:

• Startups can design custom chips without billion-dollar budgets.
• Researchers can prototype new architectures in weeks, not years.
• Students learn chip design by contributing to real, open-source projects.
• Hobbyists can fabricate their own chips for niche applications.

This isn’t just a pipe dream — it’s already happening in pockets of the open-source hardware community. With your help, we can scale it up and create a true alternative to the closed silicon dominance of today.

Final Thoughts

Apple’s custom silicon is a testament to what’s possible when hardware, software, and ecosystem are tightly integrated. But innovation shouldn’t be limited to a few corporations. By building an open-source alternative, we can democratize chip design, foster collaboration, and push the boundaries of what’s possible.

So, what do you think?

• Does this vision resonate with you?
• What would you add, change, or improve in the framework?
• How can we make this project more accessible to contributors?

Let’s build the future of open silicon — together.

Follow me on GitHub for updates, and stay tuned for more!

Special thanks to the open-source hardware community, RISC-V International, and everyone who’s already contributed to making chip design more accessible.