Vivado alternative: learn the logic before the FPGA

AMD Vivado is the design software for AMD's adaptive SoCs and FPGAs. It covers design entry, synthesis, place and route, and verification, including a full-featured HDL simulator. AMD's page says that from the 2026.1 release Vivado moves to a tiered licensing model, from free entry-level access up to full-featured paid tiers, with Vivado Enterprise unchanged, and it describes a free toolchain for its Spartan UltraScale+ FPGAs. It is a desktop download aimed at real hardware. Vivado turns a hardware description into a configured AMD FPGA; digiwleea is where you learn what that description is made of, with nothing to install.

What Vivado is good at

Everything needed to put a design on a real AMD FPGA: write or import RTL, synthesize it, place and route it, check timing and power, and simulate it with the built-in simulator. For a digital design lab built on an AMD board, it is the standard tool. (digiwleea is an independent project, not affiliated with AMD.)

How digiwleea is different

digiwleea runs in the browser, needs no board, and shows every wire's value as you build. You start from CMOS transistors, make NOT and NAND, then adders, multiplexers, flip-flops, counters, registers, RAM and an 8-bit CPU that runs a stored program, through a 40+ level course where every part is checked against its truth table, with an AI tutor (Wleea). It does not synthesize HDL or program FPGAs. It complements Vivado: learn what a counter or a state machine looks like in gates here, export the circuit to Verilog or VHDL, then build it for real. For Altera boards the same comparison is on the Quartus Prime Lite page. Choosing a language? See Verilog vs VHDL.

	Vivado	digiwleea
Purpose	Design, synthesis and implementation for AMD FPGAs	Learning digital logic, transistor to CPU
Design entry	HDL and IP-based design tools	Drawing circuits; export to Verilog and VHDL
Simulation	Full-featured HDL simulator	Live circuit simulation in the browser
Hardware	An AMD FPGA board to program	None
Price	Tiered licenses, from free entry-level to Enterprise	Free lab and Act I; Premium for the full course

No sign-up is needed to start: open the lab and place your first transistor, or read the free theory course. The account (and the AI tutor) are optional.

More comparisons: HDL, FPGA and chip design tools

Icarus Verilog vs Verilator vs GHDL Quartus Prime Lite alternative ModelSim alternative Lattice Diamond alternative HDLBits alternative Yosys alternative EDA Playground alternative Icestudio alternative WaveDrom alternative Microwind alternative Python and Scala HDLs compared IRSIM alternative

See for yourself: build a logic gate from transistors in the simulator, then follow the path from sand to an 8-bit CPU.

Open the digiwleea lab →

Frequently asked

Is Vivado free?

Partly. AMD describes a tiered licensing model from the 2026.1 release, from free entry-level access to paid full-featured tiers, and a free toolchain for its Spartan UltraScale+ FPGAs.

What does Vivado do?

It is AMD's design software for its FPGAs and adaptive SoCs: design entry, synthesis, place and route, timing and power analysis, and simulation.

Can I learn digital logic without Vivado or an FPGA?

Yes. A browser simulator such as digiwleea lets you build gates, flip-flops, counters and a small CPU and watch every signal, with no install or hardware.